Efficacy and Safety of Grazoprevir (MK-5172) and MK-3682 With Elbasvir (MK-8742) or MK-8408 for Chronic Hepatitis C Virus (HCV) Genotype (GT) 3, GT4, GT5, and GT6 Infection (MK-3682-012)

A Study of Pembrolizumab (MK-3475) in Participants With Recurrent or Metastatic Gastric or Gastroesophageal Junction Adenocarcinoma (MK-3475-059/KEYNOTE-059)

Study of Pembrolizumab (MK-3475) in Participants With Advanced Urothelial Cancer (MK-3475-052/KEYNOTE-52)

Study of MK-4280 as Monotherapy and in Combination With Pembrolizumab (MK-3475) With or Without Chemotherapy AND MK-4280A as Monotherapy in Adults With Advanced Solid Tumors (MK-4280-001)

Study of MK-8353 in Combination With Pembrolizumab (MK-3475) in Participants With Advanced Malignancies (MK-8353-013)

Safety and Tolerability of Pembrolizumab (MK-3475) + Pegylated Interferon Alfa-2b and Pembrolizumab+ Ipilimumab in Participants With Advanced Melanoma or Renal Cell Carcinoma (MK-3475-029/KEYNOTE-29)

A Study of Pembrolizumab (MK-3475) in Combination With Standard of Care Treatments in Participants With Multiple Myeloma (MK-3475-023/KEYNOTE-023)

Study of Pembrolizumab (MK-3475) Combination Therapies in Metastatic Castration-Resistant Prostate Cancer (MK-3475-365/KEYNOTE-365)