Barros, M., Piedade, J., Nunes, G., Canas-Ferreira, W., Silva, A., Champalimaud, J., & Machado-Caetano, J. (1996). Active replication of hepatitis B virus (HBV) in HIV type 1 and in HIV type 2 infected patients . Revista Do Instituto De Medicina Tropical De São Paulo, 38(4), 253-258. https://revistas.usp.br/rimtsp/article/view/29379