1. Internal Medicine Unit; Douala General Hospital; Douala Cameroon
2. Faculty of Medicine and Pharmaceutical Sciences; University of Douala; Douala Cameroon
3. Faculty of Medicine and Biomedical Sciences; University of Yaoundé I; Yaoundé Cameroon
4. Faculty of Health Sciences; University of Buea; Buea Cameroon
5. Endocrinologyand Nutrition Unit; Cliniques Universitaires St-Luc, Université Catholique de Louvain; Brussels Belgium