Promotie Mw. Uchenna Onyekachi Okafor, MSc. 31 januari 2018 16:00 Promotor: prof.dr. H.W. van den Borne Co-promotores: dr. R. Crutzen, dr. S. Adebajo “HIV Prevention; brothel leaders as facilitators of consistent condom use by female sex workers in Abuja, Nigeria”