Directly observed therapy of direct acting antivirals (DAA) for the treatment of chronic hepatitis C in HIV co-infected patients with a drug use history. (August 2018) - Gonçalves, C.; Marques, M.; Valdoleiros, S.; Santos, F. Videira; Furtado, I.; Horta, A.; Mendez, J.; Sarmento, R.; Castro, E.