[1] PCEA Chogoria Hosp, Dept Paediat, Chogoria, Kenya
[2] CHU La Renaissance, Dept Urol, Ndjamena, Chad
[3] CHU Yalgado Ouedraogo, Dept Urol, Ouagadougou, Burkina Faso
[4] Worabe Comprehens Specialized Hosp, Dept Surg, Urol Unit, Worabe, Ethiopia
[5] Douala Laquintinie Hosp, Dept Surg, Urol Unit, Douala, Cameroon
[6] CHU Ibn Rochd, Dept Urol, Casablanca, Morocco
[7] Hop Gen Reference Natl, Dept Urol, Ndjamena, Chad
[8] Usmanu Danfodiyo Univ, Teaching Hosp, Dept Urol, Sokoto, Nigeria
[9] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Publ Hlth, Baltimore, MD USA
[10] St James Univ Hosp, Leeds Teaching Hosp, Dept Urol, Leeds, England
[11] Modern Urol Africa, Casablanca, Morocco