1. (1) Département biomédical et santé publique, Institut de Recherche en Sciences de la Santé, Burkina Faso
2. (3) Institut Africain de Santé Publique, Burkina Faso
3. (2) Wittgenstein Centre for Demography and Global Human Capital, Austria
4. (4) Centre Muraz, Burkina Faso
5. (5) International Centre for Reproductive Health, Belgium
6. (6) Department of Reproductive Health and Research, Switzerland