Sexual risk behaviors among adolescent men who have sex with men in two Brazilian cities: findings from an RDS-based study.

Leal M, Kendall C, Almeida RLF, Araujo Junior AJL, Sanzana CES, Frota CC, Glick J, Meireles P, Barros H, Fiuza TM, Martins TA, Grangeiro A, Magno L, Dourado I, Rutherford G, Kalichman AO, Barreto ICHC, Gianna MC, Escuder MM, Figueiredo MB, McFarland W, Paiva MC, Feitoza AR, Kerr L