1. “Chantal Biya” International Reference Centre for Research on HIV and AIDS Prevention and Management (CIRCB), Yaounde, Cameroon.
2. Department of Biological Sciences, Higher Teacher Training College, University of Yaounde I, Yaounde, Cameroon.
3. Direction de la Lutte contre la Maladie (DLM), Ministère de la Santé, Yaounde, Cameroon.
4. WHO, AFRO, Yaounde, Cameroon.
5. Department of Biochemistry, Faculty of Medicine and Biomedical Science, University of Yaounde I, Yaounde, Cameroon.
6. Department of Internal Medicine, Faculty of Medicine and Biomedical Science, University of Yaounde I, Cameroon.