1. Paediatric Department; Hospital Lillebaelt; Kolding Denmark
2. University of Ulster; Belfast UK
3. Princess Anne Hospital; Southampton UK
4. Registry of Vaud Switzerland, Division of Medical Genetics; CHUV; Lausanne Switzerland
5. Public Health Division of Gipuzkoa, Instituto BIO-Donostia, Basque Government; CIBER Epidemiología y Salud Pública - CIBERESP; Madrid Spain
6. EUROCAT Northern Netherlands, Department of Genetics; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
7. CNR Institute of Clinical Physiology and G. Monasterio Tuscany Foundation; Pisa Italy
8. Registro IMER - IMER Registry (Emila Romagna Registry of Birth Defects); Azienda Ospedaliero-Universitaria di Ferrara; Ferrara Italy
9. Malta Congenital Anomalies Register; Directorate for Health Information and Research; Valletta Malta
10. Medical University of Graz; Graz Austria
11. INSERM, U953; Universite Paris-6; Paris France
12. South East Ireland Congenital Anomaly (EUROCAT) Registry, Public Health Department; HSE South (South East); Kilkenny Ireland
13. Osservatorio Epidemiologico Regionale; Regione Campania; Naples Italy
14. PUBLIC Health; Wales UK
15. Department of Paediatrics; University Medical Centre of the Johannes Gutenberg University Mainz; Mainz Germany