TY - JOUR A1 - Nicolosi, A. A1 - Correa Leite, M.L. A1 - Musicco, M. A1 - Arici, C. A1 - Gavazzeni, G. A1 - Lazzarin, A. T1 - The efficiency of male-to-female and female-to-male sexual transmission of the human immunodeficiency virus: a study of 730 stable couples. Italian Study Group on HIV Heterosexual Transmission Y1 - 1994 DO - 10.1097/00001648-199411000-00003 JF - Epidemiology VL - 5 IS - 6 ER -