The effects of HIV on fertility by infection duration: evidence from African population cohorts before ART availability: Fertility by duration of HIV infection - Marston, M; Nakiyingi-Miiro, J; Kusemererwa, S; Urassa, M; Michael, D; Nyamukapa, C; Gregson, S; Zaba, B; Eaton, JW; ALPHA, network (AIDS, 2016)