Lucena, Romualdo Mendonça de, and Jailson Lopes de Sousa. “Years of Potential Life Lost (YPLL) by Aids: Pernambuco, 1996 and 2005”. Brazilian Journal of Sexually Transmitted Diseases, vol. 21, no. 3, Aug. 2009, pp. 136-42, https://bjstd.org/revista/article/view/989.