1. Surgical Oncology Unit, Donka University Hospital, Conakry, Guinea
2. Infectious and Tropical Disease Department, Donka University Hospital, Conakry, Guinea
3. Department of Dermatology and Venereology, Donka University Hospital, Conakry, Guinea
4. Department of Pathology, Donka University Hospital, Conakry, Guinea
5. Department of General Surgery, University Hospital of Conakry, Guinea