Public/community engagement in health research with men who have sex with men in sub-Saharan Africa: challenges and opportunities. by Molyneux, S, Sariola, S, Allman, D, Dijkstra, M, Gichuru, E, Graham, S, Kamuya, D, Gakii, G, Kayemba, B, Kombo, B, Maleche, A, Mbwambo, J, Marsh, V, Micheni, M, Mumba, N, Parker, M, Shio, J, Yah, C, van der Elst, E, Sanders, E