1. Department of Internal Medicine and Specialities, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
2. Hepatogastroenterology Service, Yaoundé General Hospital, Yaoundé, Cameroon
3. Department of Clinical Sciences, Faculty of Medicine and Pharmaceutical Sciences, University of Douala, Douala, Cameroon
4. Department of Internal Medicine and Specialities, Faculty of Medicine and Biomedical Sciences, University of Dschang, Dschang, Cameroon
5. Department of Internal Medicine, University of Mountain, Bangangté, Cameroon
6. Hepatogastroenterology Service, Yaoundé Central Hospital, Yaoundé, Cameroon