MYER, Landon. The limits of observational epidemiology: Hormonal contraception and women’s risk of HIV infection. South African Journal of Science, [S. l.], v. 108, n. 7/8, p. 2 Pages, 2012. Disponível em: https://sajs.co.za/article/view/9797. Acesso em: 22 nov. 2024.