Longevity Labs

What we
actually test.

Comprehensive, clinician-guided lab testing built to find the patterns standard panels miss. Over 80 biomarkers across 13 body systems — so you stop guessing and start knowing.

Precision Lab Testing
Built on clinical data that matters
80+ Biomarkers
13 Body Systems
80+
Biomarkers Measured
13
Body System Panels
50K
Patients Behind the Protocol
10+
Years of Clinical Data
If you're not testing, you're not learning.

Dr. Robin Berzin, MD — Founder & CEO

The Full Picture

13 panels. Zero noise.

Built on a decade of clinical work with 50,000 patients. Each panel captures what matters and skips what doesn't, connecting the dots across every major system in your body.

Panel 01
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Autoimmune
Panel 02
Electrolytes
Panel 03
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Complete Blood Count
Panel 04
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Hormone Balance
Panel 05
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Metabolic Health
Panel 06
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Inflammation Index
Panel 07
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Kidney Function
Panel 08
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Environmental Toxins
Panel 09
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Thyroid Health
Panel 10
❤️
Heart Health
Panel 11
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Stress & Adrenal
Panel 12
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Nutrient Reserve
Panel 13
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Liver Function

Why It's Smarter

Built to answer real questions

Every biomarker was hand-picked by functional medicine physicians with one filter: does this actually change what we do for the patient?

01
Short & Long-Term Indicators

Captures how you feel today and where your body is headed if nothing changes. Both windows matter for real treatment decisions.

02
Chronic Disease Prevention

Flags the early signals that most standard labs won't catch until they're harder to fix. Prevention over reaction, every time.

03
Drivers of Longevity

Focuses on the biomarkers most tied to energy, performance, and how long your body stays functional at a high level.

04
50,000-Patient Baseline

Your results get compared against real-world clinical data, so the context behind each number actually means something.

Your Personal Readout

Results that make sense

We take 80+ data points and turn them into three clear numbers. No binder of lab results you'll never finish reading.

Score
94/100
Functional Health Score

One clinician-informed number showing how well your body systems are working together right now.

Why it matters: An at-a-glance view makes it easier to track your overall health trend over time without drowning in data.

Age
33 yrs
Functional Age

A measure of how your body is actually functioning today compared to what's typical across different life stages.

Why it matters: Puts your results in context and shows where focused attention would make the biggest difference.

Velocity
12%
Aging Velocity

An indicator of how quickly your body is changing over time, independent of your calendar age.

Why it matters: Helps you understand your trajectory and spot trends before they escalate into something harder to reverse.

Deep Dive

The story your biomarkers reveal

Every number in your results is a chapter. Here is what each panel is actually looking for — and why it matters for how you feel, perform, and age.

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Panel 01
Autoimmune
Detecting when your immune system turns on itself

Your immune system is designed to protect you. But sometimes it misfires and starts attacking your own tissue — often silently, for years, before symptoms show up. This panel catches the earliest signals of autoimmune activity so your care team can act before damage accumulates.

ANA (Antinuclear Antibody)
Screens for antibodies that attack the cell's nucleus — a hallmark of conditions like lupus, Sjogren's, and scleroderma.
Thyroid Peroxidase Antibodies (TPO)
Elevated TPO antibodies signal Hashimoto's thyroiditis, the most common cause of hypothyroidism, often present years before thyroid function drops.
Thyroglobulin Antibodies (TgAb)
Another marker of autoimmune thyroid disease. Elevated alongside TPO strengthens the case for Hashimoto's.
Rheumatoid Factor (RF)
An antibody associated with rheumatoid arthritis and other autoimmune conditions. Useful as an early screen even before joint symptoms appear.
CCP Antibody (Anti-CCP)
Highly specific for rheumatoid arthritis — often detectable years before clinical disease. More reliable than rheumatoid factor alone.
Sed Rate (ESR)
How fast red blood cells settle in a tube. A fast rate signals active inflammation or immune system activity somewhere in the body.
Panel 02
Electrolytes
The minerals that keep your body electrically alive

Electrolytes carry electrical charges through your blood and cells. They control how your nerves fire, how your muscles contract, how your heart beats, and how your kidneys manage fluid. An imbalance here touches everything — energy, cognition, and cardiovascular rhythm.

Sodium
Controls fluid balance throughout the body. Your kidneys adjust water excretion to keep sodium in a tight range. Drifts signal hydration issues or kidney and hormonal problems.
Potassium
Even small shifts cause serious heart rhythm disturbances. Critical for nerve conduction and muscle contraction, including the heart muscle.
Chloride
Works alongside sodium to maintain electrical balance and is essential for stomach acid production and carbon dioxide transport.
CO2 / Bicarbonate
The body's main acid buffer. Low bicarbonate signals metabolic acidosis; high levels point to alkalosis. Both affect how tissues get oxygen.
Calcium
Controls muscle contraction, nerve signaling, and hormone release. Tight regulation is critical — both too high and too low cause serious problems.
Magnesium
Required for over 300 enzymatic reactions. Low magnesium is one of the most common overlooked deficiencies, linked to fatigue, muscle cramps, poor sleep, and anxiety.
Phosphorus
Partners with calcium in bone structure and is essential for ATP — the molecule every cell uses for energy.
Anion Gap
Detects hidden acid accumulation in the blood — an early warning sign for conditions like ketoacidosis and kidney failure.
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Panel 03
Complete Blood Count
A snapshot of every cell type in your bloodstream

Your blood is a constantly moving ecosystem of red cells, white cells, and platelets. The CBC is the most information-dense single test in medicine — it reveals how well you're carrying oxygen, how ready your immune system is, whether you're anemic, and whether your bone marrow is working as it should.

RBC (Red Blood Cell Count)
The total number of red cells per microliter. Works with hemoglobin and hematocrit to assess your full oxygen-carrying picture.
Hemoglobin
The protein inside red cells that carries oxygen. The single best indicator of anemia and your blood's functional oxygen capacity.
Hematocrit
The percentage of blood volume made up of red cells. Testosterone therapy raises hematocrit, which needs monitoring to prevent clotting risk.
MCV, MCH, MCHC
Size and hemoglobin content of individual red cells. Together they classify the type of anemia — iron deficiency vs. B12/folate deficiency vs. chronic disease.
RDW (Red Cell Distribution Width)
How much variation exists in red cell sizes. High variation signals mixed nutritional deficiencies or bone marrow stress — often before anemia is obvious.
WBC (White Blood Cell Count)
Total immune cells in circulation. Elevated counts signal infection or inflammation; low counts signal immune suppression.
Neutrophils
Your first-responder immune cells against bacterial and fungal infections. Make up the majority of white blood cells in a healthy person.
Lymphocytes
T cells, B cells, and natural killer cells. Reflect your adaptive immune reserve and chronic viral immune load.
Monocytes
Patrol cells that mature into macrophages. Chronically elevated monocytes suggest ongoing systemic inflammation.
Eosinophils
Elevated eosinophils often signal hidden allergies, food sensitivities, or gut dysbiosis — even without obvious symptoms.
Basophils
The rarest white cells, dense with histamine. Even small changes can reflect allergic conditions or bone marrow changes.
Platelets & MPV
Platelet count determines clotting capacity. Mean platelet volume reflects how active and young your platelets are.
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Panel 04
Hormone Balance
The chemical signals that run almost everything

Hormones regulate energy, mood, sex drive, muscle mass, fat distribution, sleep, and cognitive clarity. A single imbalance ripples through multiple systems — which is why treating symptoms without testing hormones is like guessing in the dark.

Total Testosterone
The full amount of testosterone in circulation, including bound and unbound fractions. The starting point for any hormone evaluation.
Free Testosterone
Only the unbound fraction can enter cells and activate receptors. Two people with identical total testosterone can feel very different based on free levels.
SHBG (Sex Hormone Binding Globulin)
The protein that binds testosterone and makes it unavailable to tissues. High SHBG can cause low-T symptoms even when total testosterone looks normal.
Estradiol (E2)
Men need estradiol for bone health, brain function, and libido — but too much causes water retention, mood changes, and sexual dysfunction.
LH (Luteinizing Hormone)
The pituitary signal telling the testes to produce testosterone. High LH with low T means the testes aren't responding. Low LH points to a brain-level issue.
FSH (Follicle Stimulating Hormone)
Drives sperm production in men and egg development in women. Critical for fertility assessment and evaluating testicular or ovarian function.
DHEA-S
Raw material for testosterone and estrogen. Declines with age and reflects adrenal reserve — the body's long-term hormone production capacity.
Prolactin
Elevated prolactin suppresses testosterone and libido in both men and women. Often caused by pituitary issues or certain medications, and frequently overlooked.
IGF-1 & IGF-1 Z-Score
The downstream marker of growth hormone activity. Reflects tissue repair capacity, muscle protein synthesis, and metabolic vitality. Z-score adjusts for age.
Progesterone
In men, serves as a precursor for testosterone and cortisol. In women, critical for cycle regulation, mood, and sleep quality.
PSA Total & Free PSA
Prostate-specific antigen screening — especially important when on testosterone therapy. The free-to-total ratio helps distinguish benign enlargement from cancer risk.
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Panel 05
Metabolic Health
How efficiently your body turns food into fuel

Metabolic dysfunction is behind the majority of chronic disease — diabetes, cardiovascular disease, fatty liver, hormonal imbalances, and cognitive decline all have metabolic roots. Most of it develops silently over years. This panel catches the drift early, when it's still completely reversible.

Fasting Glucose
The baseline amount of sugar in your blood after fasting. When fasting glucose starts creeping up, insulin resistance is already present.
Hemoglobin A1c (HbA1c)
Average blood sugar over the past 90 days. The gold standard for tracking diabetes risk — a single glucose reading can't give you this window.
Fasting Insulin
How much insulin your pancreas needs to keep blood sugar controlled. High fasting insulin is the earliest sign of insulin resistance — years before glucose rises.
HOMA-IR
A calculated score combining fasting glucose and insulin to quantify insulin resistance. One of the most clinically useful metabolic markers most standard labs never run.
Triglycerides
Excess calories get packaged into triglycerides. High levels reflect poor metabolic processing and are tightly linked to insulin resistance and cardiovascular risk.
Triglyceride/HDL Ratio
One of the best single indicators of insulin resistance. A ratio above 3 signals significant metabolic dysfunction even when other numbers look acceptable.
Uric Acid
High uric acid causes gout but also signals broader metabolic dysfunction — independently associated with cardiovascular and kidney risk.
Lactate Dehydrogenase (LDH)
Present in nearly every tissue. Elevated LDH means cells are being damaged somewhere — a broad but sensitive marker of cellular stress.
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Panel 06
Inflammation Index
The slow fire most people don't know they're carrying

Acute inflammation is how your body heals. Chronic low-grade inflammation is how your body breaks down — quietly accelerating heart disease, cancer, neurodegeneration, and hormonal decline. These markers detect that background fire before it does lasting damage.

High-Sensitivity CRP (hs-CRP)
Your liver releases CRP when inflammatory signals are present anywhere in the body. The high-sensitivity version detects the low-level chronic inflammation tied to cardiovascular and metabolic disease.
NLR (Neutrophil-to-Lymphocyte Ratio)
The ratio of first-responder to adaptive immune cells. A rising NLR reflects chronic systemic stress and is one of the strongest predictors of long-term health outcomes.
PLR (Platelet-to-Lymphocyte Ratio)
Combines platelet activity with immune cell balance. Elevated in metabolic disease, infections, and chronic inflammatory conditions.
MLR (Monocyte-to-Lymphocyte Ratio)
A high MLR indicates the immune system is in a chronic activation state rather than a targeted response to a specific threat.
SII (Systemic Immune-Inflammation Index)
Combines platelet, neutrophil, and lymphocyte counts into a single composite score. One of the most comprehensive inflammation markers from a standard blood draw.
Homocysteine
An amino acid that damages blood vessel walls when elevated. Independently linked to cardiovascular disease and cognitive decline — often driven by B vitamin deficiency.
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Panel 07
Kidney Function
Your body's filtration and fluid regulation system

Your kidneys filter about 200 liters of blood every day, removing waste, regulating electrolytes, controlling blood pressure, and activating vitamin D. Kidney decline is usually silent until significant function is already lost — this panel catches the early signs when intervention still makes a major difference.

Creatinine
A waste product from muscle metabolism, cleared by the kidneys at a steady rate. Rising creatinine is one of the first reliable signs of reduced kidney filtration.
eGFR (Estimated Glomerular Filtration Rate)
Estimates how many milliliters of blood your kidneys filter per minute. The primary staging marker for chronic kidney disease.
BUN (Blood Urea Nitrogen)
How your liver disposes of protein breakdown waste. Measuring BUN reveals both waste production and how well your kidneys are clearing it.
BUN/Creatinine Ratio
Distinguishes true kidney failure from dehydration, GI bleeding, or high-protein diet — they respond differently to each condition.
Urine Protein
Protein leaking into urine is a direct sign of filtration barrier damage — one of the earliest signals of diabetic or hypertensive kidney disease.
Urinalysis (Full Panel)
Includes glucose, ketones, blood, nitrites, leukocyte esterase, pH, and specific gravity. A rich source of information about metabolic, infectious, and kidney health all at once.
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Panel 08
Environmental Toxins
What your environment leaves behind in your biology

Heavy metals and environmental toxins accumulate in the body over time from food, water, air, and occupational exposure. They disrupt hormones, impair cognition, damage the kidneys, and accelerate inflammation — often without obvious symptoms for years.

Lead
Accumulates in bones and soft tissue. Even low-level lead exposure impairs cognitive function, raises blood pressure, and disrupts hormone signaling. There is no safe threshold.
Mercury
Primarily from fish consumption. Mercury targets the nervous system and kidneys. Elevated levels are associated with cognitive decline, fatigue, and peripheral neuropathy.
Arsenic
Found in rice, some seafood, and groundwater in many regions. Chronic exposure increases cancer risk and is a potent disruptor of insulin signaling and cardiovascular health.
Cadmium
A kidney toxin that accumulates over a lifetime — primarily from cigarette smoke and contaminated food. Linked to bone loss and lung disease.
GGT (Liver Detox Capacity)
Particularly sensitive to toxic liver stress, alcohol exposure, and certain medications. Signals whether your liver's detoxification pathways are being overloaded.
TMAO (Trimethylamine N-Oxide)
A gut-bacteria metabolite from red meat and eggs. Elevated TMAO reflects both gut microbiome composition and a dietary pattern linked to accelerated cardiovascular disease.
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Panel 09
Thyroid Health
The master regulator of your metabolism and energy

Your thyroid sets the speed of almost every metabolic process — energy production, temperature regulation, heart rate, gut motility, cognitive speed, and weight management. Standard care often only tests TSH, which misses the full picture. This panel gives you the complete view.

TSH (Thyroid Stimulating Hormone)
The pituitary signal that controls thyroid output. TSH rises when thyroid hormone is low and suppresses when it's high — a sensitive upstream indicator of thyroid status.
Free T4 (FT4)
The main hormone secreted by the thyroid. Largely inactive until converted to T3 in peripheral tissues. Measuring it separately from TSH reveals whether the thyroid is producing adequate hormone.
Free T3 (FT3)
The active form that enters cells and drives metabolism. Some people convert T4 to T3 poorly — leaving them with hypothyroid symptoms even when TSH and T4 look normal.
Reverse T3 (rT3)
An inactive T3 mirror image the body produces during stress or illness. High rT3 blocks active T3 receptors and creates functional hypothyroidism even when other markers look fine.
FT3/T4 Ratio
Reveals how efficiently your body converts inactive T4 into active T3. A low ratio means conversion is impaired — a common but underdiagnosed pattern in people with fatigue and weight issues.
T4/TSH Ratio
Helps characterize whether thyroid dysfunction originates in the thyroid gland itself or in pituitary regulation — an important distinction for treatment.
TPO & Thyroglobulin Antibodies
Autoimmune attack on the thyroid. Present in Hashimoto's disease, often for years before thyroid function visibly declines. Early detection allows for interventions that slow progression.
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Panel 10
Heart Health
Beyond cholesterol — a real picture of cardiovascular risk

Half of all heart attacks happen in people with "normal" cholesterol. The standard lipid panel misses the most important risk factors. This panel goes deeper — looking at particle quality, inflammatory burden, and vascular health markers that actually predict events decades in advance.

Total Cholesterol
The combined amount of all cholesterol in circulation. Useful context but a poor standalone predictor — the ratios and particle details tell a far more accurate story.
LDL Cholesterol
The primary carrier of cholesterol to peripheral tissues. Problems arise when too many LDL particles circulate and small, dense ones penetrate artery walls.
HDL Cholesterol
Removes excess cholesterol from arteries and returns it to the liver. Also fights inflammation and prevents oxidation in vessel walls.
Triglycerides
Excess energy stored as fat in the blood. High triglycerides directly signal metabolic dysfunction and contribute to dangerous small LDL particle formation.
Non-HDL Cholesterol
Total cholesterol minus HDL. Captures all potentially harmful particles in one number — a better predictor than LDL alone.
Estimated ApoB
Each atherogenic particle carries one ApoB molecule. Counting particles predicts cardiovascular risk better than measuring their cholesterol content — this is what actually drives plaque.
Lipoprotein(a) — Lp(a)
A genetically determined particle that resists lifestyle modification. Elevated Lp(a) is present in 20% of the population and is a major independent risk factor most people never know about.
hs-CRP (Vascular Inflammation)
Vascular inflammation is the proximate trigger of most heart attacks. High-sensitivity CRP detects the low-grade inflammatory state that activates and destabilizes arterial plaque.
Cholesterol Ratios (Total/HDL, LDL/HDL, AIP)
Ratios comparing protective to harmful cholesterol fractions. The atherogenic index of plasma reflects whether your lipid pattern favors artery-clogging small particles.
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Panel 11
Stress & Adrenal
What chronic stress is doing to your hormones and body

Your adrenal glands produce the hormones that manage your stress response, blood pressure, energy, and inflammation. Chronic stress burns through adrenal reserves, disrupts the cortisol rhythm, and shifts the body into a catabolic state — breaking down muscle, storing fat, suppressing immunity, and impairing sleep.

Cortisol (Morning)
Your primary stress hormone, meant to peak sharply in the morning and decline throughout the day. A flat or inverted curve signals adrenal dysregulation and is one of the most common causes of chronic fatigue.
DHEA-S
The adrenal's anabolic counterweight to cortisol. Declines with age but drops faster under chronic stress. Low DHEA-S with high cortisol is the hallmark of adrenal burnout.
DHEA-S/Cortisol Ratio
Compares the body's anabolic and catabolic hormone balance. A low ratio means the body is in a tissue-breaking stress state — even in people who don't feel particularly stressed.
Free Testosterone/Cortisol Ratio
Testosterone builds tissue; cortisol breaks it down. This ratio tracks overtraining and recovery capacity — it applies just as much to everyday physiological stress.
Testosterone/Cortisol Ratio
A broader view of anabolic vs. catabolic balance. Persistently unfavorable ratios explain why some people train hard, eat well, and still struggle to build muscle or lose fat.
Prolactin
Elevated by physical and psychological stress as well as pituitary issues. High prolactin suppresses testosterone and reduces libido, creating a hormonal stress cascade.
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Panel 12
Nutrient Reserve
The raw materials your body can't function without

Micronutrient deficiencies are more common than most people realize — and they don't always show up as obvious symptoms. Instead they show up as persistent fatigue, low mood, poor recovery, brain fog, and hormonal imbalances that supplements never seem to fix because the wrong ones are being taken.

Vitamin D (25-OH Total)
The most commonly deficient nutrient in modern populations. Vitamin D is technically a hormone — it regulates immune function, calcium absorption, testosterone production, and mood.
Vitamin B12
Essential for nerve function, DNA synthesis, and red blood cell production. Deficiency develops slowly but causes irreversible neurological damage if untreated.
Folate
Drives DNA repair and methylation. Critical for cardiovascular health, mood regulation, and fertility. May persist as a problem in people with MTHFR gene variants.
Magnesium (RBC)
RBC magnesium reflects intracellular stores — far more accurate than serum magnesium. Deficiency causes muscle cramps, poor sleep, anxiety, and cardiovascular irregularities.
Ferritin & Iron Panel
Ferritin reflects stored iron — the first thing to drop before anemia develops. Low ferritin causes fatigue, hair loss, and brain fog even when red blood cell counts look normal.
Vitamin D / hs-CRP Ratio
Low vitamin D and high inflammation tend to coexist and amplify each other. This ratio captures the combined nutritional-inflammatory risk in a single glance.
CoQ10
A mitochondrial cofactor essential for cellular energy production. Naturally declines with age and is further depleted by statin medications — critical for people on cholesterol-lowering therapy.
Zinc & Selenium
Zinc supports testosterone production, immune function, and wound healing. Selenium powers antioxidant enzymes and supports thyroid hormone conversion from T4 to active T3.
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Panel 13
Liver Function
Your body's central processing and detox hub

The liver performs over 500 functions — metabolizing hormones, producing proteins, filtering toxins, regulating cholesterol, managing blood sugar between meals, and activating vitamins. Liver stress is extraordinarily common in modern life and rarely causes symptoms until significant damage has already occurred.

ALT (Alanine Aminotransferase)
The most liver-specific enzyme in a standard panel. Elevated ALT means liver cells are being damaged or inflamed — the first sign of fatty liver disease, medication toxicity, or viral hepatitis.
AST (Aspartate Aminotransferase)
Released by liver, heart, and muscle cells when damaged. The AST/ALT ratio is a powerful diagnostic tool for identifying the source and type of liver stress.
GGT (Gamma-Glutamyl Transferase)
Particularly sensitive to alcohol, toxic burden, and certain medications. Rises before other liver enzymes and is a strong predictor of metabolic syndrome when chronically elevated.
Alkaline Phosphatase (ALP)
Elevated when bile flow is obstructed or bone remodeling is accelerated. The GGT/ALP ratio distinguishes between liver and bone as the source.
Bilirubin (Total & Direct)
The yellow pigment from red blood cell breakdown that the liver processes and excretes. Elevated bilirubin signals liver processing or bile flow is impaired.
Albumin
The most abundant blood protein, produced exclusively by the liver. Low albumin reflects reduced liver synthetic capacity — one of the most reliable markers of chronic liver disease severity.
FIB-4 Index
A non-invasive score combining age, liver enzymes, and platelet count to estimate liver fibrosis without a biopsy. Identifies patients who need closer monitoring.
De Ritis Ratio (AST/ALT)
Distinguishes alcohol-related liver disease from non-alcoholic fatty liver, viral hepatitis, or bile duct obstruction — each requiring a different treatment approach.
Hepatic Steatosis Index (HSI)
A calculated risk score for fatty liver using body measurements and liver enzymes. Non-alcoholic fatty liver disease affects 1 in 4 adults worldwide.

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