1. Queen Mary University of London; London United Kingdom
2. Paediatric Department; Hospital Lillebaelt; Kolding Denmark
3. Faculty of Medicine; University of Southampton and Wessex Clinical Genetics Service; Southampton United Kingdom
4. Division of Medical Genetics; Lausanne Switzerland
5. Subdirección de Salud Pública; San Sebastian Spain
6. Children's Hospital Zagreb; Clinical Hospital Centre Sisters of Charity; Medical School University of Zagreb; Zagreb Croatia
7. Department of Hungarian Congenital Abnormality Registry and Surveillance; National Institute for Health Development; Budapest Nagyvárad tér 2 Hungary
8. CNR Institute of Clinical Physiology; Pisa Italy
9. University of Leicester; Leicester United Kingdom
10. Registo Nacional de Anomalias Congénitas; Escola Nacional de Saúde Pública; Lisbon Portugal
11. Department of Health Information and Research; Guardamangia, Malta Martin Haeusler; Medical University of Graz; Guardamangia Australia
12. Medical Birth Registry of Norway; Norwegian Institute of Public Health; Bergen Norway and Department of Global Public Health and primary Care; University of Bergen; Bergen Norway
13. INSERM U953; Paris France
14. Polish Registry of Congenital Malformations; Department of Medical Genetics; Poznan University of Medical Sciences; Poznan Poland
15. Health Service Executive; Kilkenny Ireland
16. Provincial Institute for Hygiene; Antwerp Belgium
17. Registro IMER; Universitaria di Ferrara; Ferrara Italy
18. Health Service Executive; Cork Ireland
19. University Medical Center of the Johannes Gutenberg University Mainz; Mainz Germany
20. Chu la Reunion; Ile de la Reunion; St Pierre Reunion
21. Institute of Health & Society Newcastle University; Newcastle upon Tyne United Kingdom
22. Malformation Monitoring Centre Saxony-Anhalt; Medical Faculty Otto-von-Guericke University Magdeburg; Magdeburg Germany
23. National Perinatal Epidemiology Unit; University of Oxford; Oxford United Kingdom
24. Thomayer University Hospital; Prague Czech Republic
25. St Michaels Hospital; Bristol United Kingdom
26. Public Health Wales; Swansea United Kingdom
27. Department of Genetics; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
28. OMNI-Net for Children; Rivne Ukraine
29. Institute of Nursing Research; University of Ulster; Newtonabbey Co Antrim, Northern Ireland United Kingdom