Sofosbuvir Recruiting Phase 4 Trials for Co-Infection / Substance Abuse / Human Immunodeficiency Virus Infection(HIV)/Acquired Immunodeficiency Syndrome (AIDS) / Opioid Dependence / Chronic Hepatitis C Virus (HCV) Infection / HIV-1-infection / Methadone Dependence / Intravenous Drug Usage / Bone Diseases, Metabolic Treatment