1. Department Women-Mother-Child, Clinic of Neonatology, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
2. Department of Pediatrics, Fribourg Cantonal Hospital, Fribourg, Switzerland
3. Department of Pediatrics, Riviera-Chablais Hospital, Rennaz, Switzerland
4. Department of Pediatrics, Neuchâtel Hospital, Neuchâtel, Switzerland
5. Department of Pediatrics, Yverdon Hospital, Yverdon, Switzerland
6. Unit of Pediatrics, Nyon Hospital, Nyon, Switzerland
7. Clinic of Pediatrics, Hospital Center of Valais Romand, Hospital of Valais, Sion, Switzerland
8. Department of Pediatrics, Morges Hospital, Morges, Switzerland
9. Department of Pediatrics, De la Broye Intercantonal Hospital, Payerne, Switzerland