1. Statistics and Epidemiology, RTI International, Research Triangle Park, NC 27709-2194, USA
2. Limbe Provincial Hospital, Limbe, Cameroon
3. Hôpital Militaire de Yaoundé, Yaoundé, Cameroon
4. AMO-Congo, Lubumbashi, Democratic Republic of Congo
5. AMO-Congo, Matadi, Democratic Republic of Congo
6. Hôpital Général de Yaoundé, Yaoundé, Cameroon
7. AMO-Congo, Kinshasa, Democratic Republic of Congo
8. Centre Hospitalo-Universitaire de Kamenge, Bujumbura, Burundi
9. Ecole de Santé Publique, Kinshasa, Democratic Republic of Congo
10. Vindata Solutions, Yaoundé, Cameroon