TY - JOUR A1 - Wiley, J. A1 - Herschkorn, S. A1 - Padian, N. T1 - Heterogeneity in the probability of HIV transmission per sexual contact: the case of male-to-female transmission in penile-vaginal intercourse Y1 - 1989 DO - 10.1002/sim.4780080110 JF - Statistics in Medicine VL - 8 IS - 1 SP - 93 EP - -102 ER -