Gregson, S, E Gonese, T B Hallett, N Taruberekera, J W Hargrove, B Lopman, E L Corbett, R Dorrington, S Dube, K Dehne, and others. "HIV decline in Zimbabwe due to reductions in risky sex? Evidence from a comprehensive epidemiological review." International Journal of Epidemiology 39, no. 5 (2010): 1311.