TY - JOUR A1 - Gregson, S. A1 - Mushati, P. A1 - White, P. J. A1 - Mlilo, M. A1 - Mundandi, C. A1 - Nyamukapa, C. T1 - Informal confidential voting interview methods and temporal changes in reported sexual risk behaviour for HIV transmission in sub-Saharan Africa Y1 - 2004 DO - 10.1136/sti.2004.012088 JF - Sexually Transmitted Infections VL - 80 IS - Supplement 2 SP - 36 EP - -42 ER -