Arroyave, M. L.; Echeverry, M. L.; Jaramillo, C.; Navarrete, L.; Ramírez, M. L.; Ramírez, R.; Vega, Y.; Torres, Y. Infection by the Hepatitis B Virus (HBV) in the Personnel of Health Institutions in Medellín- Colombia 1983. Med UPB 1985, 4 (1), 17-29.