1. Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
2. Department of Radiology, Yaounde Gynaeco-Obstetric and Pediatric Hospital, Yaounde, Cameroon
3. Department of Pediatric Surgery, Yaounde Gynaeco-Obstetric and Pediatric Hospital, Yaounde, Cameroon
4. Department of Neonatology, Yaounde Gynaeco-Obstetric and Pediatric Hospital, Yaounde, Cameroon