HIV infection and related risk behaviours in a disadvantaged youth institution of São Paulo, Brazil - Zanetta, Dirce Maria Trevisan; Strazza, Leila; Azevedo Neto, Raymundo Soares de; Carvalho, Heraclito Barbosa de; Massad, Eduardo; Menezes, R. X.; Ferreira, D. P.; Burattini, Marcelo Nascimento (International Journal of STD & AIDS, 1999)