Posada, D.H. et al. 2020. High-risk human papillomavirus infection and associated factors in the anal canal of HIV-positive patients in Medellín, 2017–2018. Revista de Saúde Pública. 54, (nov. 2020), 93. DOI:https://doi.org/10.11606/s1518-8787.2020054001692.