Sexual behaviour patterns and other risk factors for HIV infection in rural Tanzania: a case-control study. by Quigley, M, Munguti, K, Grosskurth, H, Todd, J, Mosha, F, Senkoro, K, Newell, J, Mayaud, P, ka-Gina, G, Klokke, A, Mabey, D, Gavyole, A, Hayes, R