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All Studies ADHD (Attention-Deficit/Hyperactivi... Adrenoleukodystrophy (ALD) — Health... Alzheimer's Disease / Mild Cognitiv... Amyotrophic Lateral Sclerosis (ALS) Binge-eating disorder and obesity Bipolar I Disorder / Depression Brain Health (Healthy Volunteers) Brain Research (Healthy Volunteers) Brain imaging (PET) research (healt... COPD / Respiratory Health COVID-19 (vaccine prevention) COVID-19 / Brain Health Cannabis Use Disorder Cannabis and alcohol use (healthy v... Cannabis use (healthy volunteers) Cardiovascular Disease Chronic Pain / Depression Chronic low back pain and depressio... Chronic pain and low/sad mood Cognition (learning and memory) Down Syndrome / Hyperactivity E-cigarette / nicotine use (healthy... Effects of psychoactive substances... Epstein-Barr virus (EBV) / infectio... HIV / Brain Health HIV / Neurological Function Healthy aging / unmet health needs... Hearing Loss / Memory High Blood Pressure / Hypertension High blood pressure (hypertension)... Immunization / Vaccine Research Inattention, impulsivity, mood, and... Intimate partner violence (IPV) / f... Major Depressive Disorder (MDD) Major Depressive Disorder / Alcohol... Malaria (healthy volunteers) Mental Health / Sexual Health Mental Health / Stress & Resilience Myalgic Encephalomyelitis / Chronic... Nicotine / tobacco use (healthy vol... Obesity / Weight Management Obesity or overweight (without type... Obesity; food insecurity Obsessive-Compulsive Disorder (OCD) Opioid Use Disorder Opioid use / trauma Osteogenesis Imperfecta (OI) Parkinson's Disease Parkinson's Disease / REM Sleep Dis... Parkinson's disease Precision medicine (multiple diseas... Premenstrual syndrome (PMS) / preme... Safety, health and well-being of fo... Severe PMS / PMDD; premenstrual sym... Type 1 or Type 2 Diabetes (recently... Type 2 Diabetes Vaccine / challenge clinical trials... Vision / Hearing Women's Health / Menstrual Cycle /... Women's Health / Premenstrual Syndr...