1. Johns Hopkins Center for Communication Programs, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
2. Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
3. Public Health Department, Africa Center of Excellence for Prevention and Control of Communicable Diseases (CEA-PCMT), Université Gamal Abdel Nasser de Conakry , Conakry, Guinea