1. Department of Pediatric Surgery of Medecine, Universite Cheikh Anta Diop, Dakar, Senegal
2. Department of Pediatric Surgery, Albert Royer Children's Hospital, Dakar, Senegal
3. Chirurgie, Universite Gaston Berger, Saint-Louis, Senegal
4. Chirurgie Viscérale, Regional Hospital of Saint-Louis, Senegal, Saint-Louis, Senegal
5. Department of Anesthesiology, Regional Hospital of Saint-Louis, Senegal, Saint-Louis, Senegal
6. Department of Pathologists, Universite Gaston Berger, Saint-Louis, Senegal
7. Department of Pediatric Surgery, Hopital Aristide Le Dantec, Dakar, Dakar, Senegal