1. Department of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
2. Department of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon2National Social Insurance Fund Hospital, Yaoundé, Cameroon
3. Edéa Regional Hospital, Edéa, Cameroon4Medical Diagnostic Center, Yaoundé, Cameroon
4. Department of Internal Medicine, University of British Columbia, Vancouver, British Columbia, Canada
5. Department of Preventive and Social Medicine, Laval University, Québec City, Québec, Canada
6. Douala General Hospital, Douala, Cameroon
7. Yaoundé General Hospital, Yaoundé, Cameroon
8. Geneva Teaching Hospital, Geneva, Switzerland
9. Department of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon3Edéa Regional Hospital, Edéa, Cameroon7Douala General Hospital, Douala, Cameroon