1. Ministry of Public Health, Djeleng Subdivisional Hospital, Bafoussam, Cameroon
2. Ministry of Public Health, Mengueme Subdivisional Hospital, Mengueme, Cameroon
3. Department of Surgery, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
4. Ministry of Public Health, Surgery Unit, Mifi District Hospital, Bafoussam, Cameroon
5. Ministry of Public Health, Surgery Unit, Eseka District Hospital, Eseka, Cameroon
6. Ministry of Public Health, Department of Pathology, Gynaeco-Obstetric and Pediatric Hospital, Yaoundé, Cameroon
7. Department of Radiology, Radiotherapy and Medical Imaging, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
8. Department of Pathology, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon