[1] Department of Epidemiology and Public Health,Faculty of Medicine
[2] Centre Pasteur of Cameroon,Department of Medicine
[3] University of Paris Sud XI,Department of Public Health, Faculty of Medicine and Biomedical Sciences
[4] Groote Schuur Hospital and University of Cape Town,Department of Disease, Epidemics and Pandemics Control
[5] University of Yaoundé 1,School of Public Health, Faculty of Medicine & Biomedical Sciences
[6] Sickle Cell Disease Unit,undefined
[7] Mother and Child Centre of the Chantal Biya Foundation,undefined
[8] Ministry of Public Health,undefined
[9] Clinical Research Education,undefined
[10] Networking and Consultancy (CRENC),undefined
[11] University of Queensland,undefined