Additional Relevant Details The MAA for Epclusa is supported by data from four Phase 3 studies, ASTRAL-1, ASTRAL-2, ASTRAL-3 and ASTRAL-4. In the ASTRAL-1, ASTRAL-2 and ASTRAL-3 studies, 1,035 patients with genotypes 1-6 HCV infection, without cirrhosis or with compensated cirrhosis (Child-Pugh A) received 12 weeks of Epclusa. The ASTRAL-4 study randomized 267 patients with genotypes 1-6 HCV infection, with decompensated cirrhosis (Child-Pugh B) to receive 12 weeks of Epclusa with or without ribavirin (RBV) or 24 weeks of Epclusa. The primary endpoint for each study was sustained virologic response 12 weeks after completing therapy (SVR12).