A phase 3 Randomized, Open-Label, Study to Evaluate the Safety and Efficacy of the combined single dose of Dactavira Plus (EPGCG, Sofosbuvir , Daclatasvir & Ribavirin) versus Sofosbuvir + Daclatasvir + Ribavirin (Part A) and a single dose of Dactavira (EPGCG, Sofosbuvir & Daclatasvir) versus Sofosbuvir + Daclatasvir (Part B) in Egyptian Adults with Chronic Genotype 4 HCV Infection.