[1] Administrative Data Research Centre Northern Ireland, Ulster University, Belfast
[2] Institute of Nursing and Health Research, Ulster University, Belfast
[3] Paediatric Department, Hospital Lillebaelt, Kolding
[4] Medical Genetics, CHUV, Lausanne
[5] University of Groningen, University Medical Center Groningen, Department of Genetics, Eurocat Northern Netherlands
[6] Registre des Malformations Congenitales de la Reunion, Saint-Pierre, Ile de la Reunion
[7] Health Information and Research, Guardamangia
[8] Division of Mental and Physical Health, Norwegian Institute of Public Health, Bergen
[9] Department of Global Public Health and Primary Care, University of Bergen, Bergen
[10] Inserm UMR 1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (Epopé), Center for Epidemiology and Statistics Sorbonne Paris Cité, DHU Risks in Pregnancy, Paris Descartes University, Paris
[11] Congenital Anomaly Register and Information Service for Wales, Public Health Wales, Swansea
[12] IMER Registry (Emilia Romagna Registry of Birth Defects), University of Ferrara and Azienda Ospedaliero Universitaria di Ferrara, Ferrara
[13] Tuscany Registry of Congenital Defects, Institute of Clinical Physiology, National Research Council/Fondazione Toscana Gabriele Monasterio, Pisa
[14] Malformation Monitoring Centre Saxony-Anhalt, Medical Faculty Otto-von-Guericke University Magdeburg, Magdeburg