1. Department of Surgery, Mbouo Protestant Hospital, Bandjoun, Cameroon
2. Faculty of Medecine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
3. Department of Surgery, Yaounde Central Hospital, Yaounde, Cameroon
4. Department of Radiology and Medical Imaging, Yaounde Gynaeco-Obstetrical and Paediatric Hospital, Yaounde, Cameroon
5. Department of Surgery, Douala Gynaeco-Obstetrical and Paediatric Hospital, Douala, Cameroon
6. Faculty of Health Sciences, University of Buea, Buea, Cameroon