1. Department of Pediatric Surgery, CHU-HME, Nantes, France.
2. CHU Caen, Caen, France.
3. CHU Lyon, Lyon, France.
4. Pediatric Surgery Liège, Liege, Belgium.
5. CHU Montpellier, Montpellier, France.
6. Department of Paediatric Surgery, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
7. CHU St. Etienne, St. Etienne, France.
8. Pediatric Surgery Luxembourg, Luxembourg, Luxembourg.
9. CHU Angers, Angers, France.
10. CHU Nantes, Nantes, France.