Market and risk: stages of hiv transmission among men with homosexual behaviors. Medellín 1993-2006. Colombia Medica, [S. l.], v. 38, n. 3, p. 222–250, 2007. DOI: 10.25100/cm.v38i3.507. Disponível em: https://colombiamedica.univalle.edu.co/index.php/comedica/article/view/507. Acesso em: 11 jan. 2026.