1. Cameroon Cardiovascular Research Network, Douala, Cameroon
2. University of Douala, Department of Clinical Sciences, Douala, Cameroon
3. Cardiovascular Research Unit, Department of Cardiology, Clinique Paul Picquet, Sens, France
4. The Jakaya Kikwete Cardiac Institute, Muhimbili National Hospital, Dar es Salaam, Tanzania
5. Institut national de la jeunesse et sport (INJS), Yaoundé, Cameroon
6. Hôpital de District de Bonassama, Douala, Cameroon
7. Hôpital de District de New-Bell, Douala, Cameroon
8. Service de cardiologie, hôpital Laquintinie de Douala, Cameroon