TY - JOUR A1 - van Vliet, C. A1 - Meester, E.I. A1 - Korenromp, E.L. A1 - Singer, B. A1 - Bakker, R. A1 - Habbema, J.D. T1 - Focusing strategies of condom use against HIV in different behavioural settings: an evaluation based on a simulation model Y1 - 2001 JF - Bulletin of the World Health Organization VL - 79 IS - 5 SP - 442 EP - -454 ER -