1. Department of Public Health, Joseph Ki Zerbo University, Ouagadougou, Burkina Faso; Department of Dental Surgery, Joseph Ki Zerbo University, Ouagadougou, Burkina Faso
2. Department of Public Health, Joseph Ki Zerbo University, Ouagadougou, Burkina Faso
3. Department of Dental Surgery, Joseph Ki Zerbo University, Ouagadougou, Burkina Faso
4. Public Health and Preventive Medicine Service, Cheikh Anta Diop University, Dakar, Senegal