1. Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry; Queen Mary University of London; London UK
2. Paediatric Department; Hospital Lillebaelt; Kolding Denmark
3. Centre for Maternal, Fetal and Infant Research, Institute of Nursing and Health Research; Ulster University; Newtownabbey UK
4. Department of Pharmacy; Unit of PharmacoEpidemiology and PharmacoEconomics; Groningen The Netherlands
5. Division of Medical Genetics; CHUV; Lausanne Switzerland
6. University Medical Centre of Groningen; Groningen The Netherlands
7. Department of Medical Genetics and Reproductive Health, Children's Hospital Zagreb; Medical School University of Zagreb; Zagreb Croatia
8. Department of Health Information and Research; Guardamangia Malta
9. Medical Birth Registry of Norway, The Norwegian Institute of Public Health and Department of Global Public Health and Primary Care; University of Bergen; Bergen Norway
10. Department of Medical Genetics; Poznan University of Medical Sciences; Poznan Poland
11. Center for biostatistics and epidemiology; INSERM U1153; Paris France
12. Provinciaal Instituut voor Hygiene (PIH); Antwerp Belgium
13. IMER Registry (Emila Romagna Registry of Birth Defects); Center for Clinical and Epidemiological Research University of Ferrara and Azienda Ospedaliero- Universitaria di Ferrara; Ferrara Italy
14. Public Health Medicine; Health Service Executive; Cork Ireland
15. National Research Council (IFC-CNR); Institute of Clinical Pharmacology; Pisa Italy
16. Congenital Anomaly Register and Information Service for Wales; Public Health Wales; Swansea UK
17. Department of Genetics; EUROCAT Northern Netherlands, University of Groningen, University Medical Center Groningen; Groningen The Netherlands
18. Mainz Model Birth Registry; University Children's Hospital Mainz; Germany
19. Centre for Maternal, Fetal and Infant Research, Institute of Nursing and Health Research; Ulster University; Newtownabbey