TY - JOUR A1 - De Vincenzi, I. A1 - European Study Group on Heterosexual Transmission of HIV T1 - A longitudinal study of human immunodeficiency virus transmission by heterosexual partners Y1 - 1994 DO - 10.1056/NEJM199408113310601 JF - New England Journal of Medicine VL - 331 IS - 6 SP - 341 EP - -346 ER -