Efficacy and Safety of MK-7622 as Adjunct Therapy in Participants With Alzheimer's Disease (MK-7622-012)

Dimethyl Fumarate (DMF) Observational Study

One Year Study of Rifaximin Delayed Release (DR) Tablets in Crohn's Disease

A Study of Pembrolizumab (MK-3475) for First Line Treatment of Recurrent or Metastatic Squamous Cell Cancer of the Head and Neck (MK-3475-048/KEYNOTE-048)

Observational Study of Characteristics, Treatment and Outcomes With Severe Asthma in the United States (CHRONICLE)

Durolane Versus Phosphate Buffered Saline (PBS) in Knee Osteoarthritis

A Study to Assess Efficacy and Safety of SER‑287 in Adults With Active Mild-to-Moderate Ulcerative Colitis

Ambulatory Post-Syncope Arrhythmia Protection Feasibility Study

CHAMP: Study of NVK-002 in Children With Myopia