1. Division of Genetics & Epidemiology; Institute of Cancer Research; Sutton UK
2. Department of Medical Genetics; Addenbrooke's Hospital; Cambridge UK
3. Centre for Genetic Medicine; Institute of Human Development; University of Manchester; Manchester UK
4. University of California, San Diego, and Rady Children's Hospital; San Diego California
5. Pediatric Genetics; University of New Mexico; Albuquerque New Mexico
6. Department of Medical Genetics; Hopital Necker Enfants Malades; Paris France
7. Clinical Genetics; Guy's and St Thomas' Foundation Trust; London UK
8. Unité de Génétique Médicale; CHU La Réunion; Réunion France
9. Clinical Genetics; West of Scotland Genetics Service; Glasgow UK
10. National Centre for Medical Genetics; Dublin The Republic of Ireland
11. Northern Ireland Regional Genetics Service; Belfast City Hospital; Belfast Northern Ireland UK
12. Servico de Genetica; Hospital S Maria; Lisbon Portugal
13. Department of Developmental Medicine (Pediatrics); Osaka University Graduate School of Medicine; Osaka Japan
14. Medical Genetics; St George's University of London; London UK
15. Peninsula Clinical Genetics Service; Royal Devon and Exeter Foundation NHS Trust; Exeter UK
16. Department of Clinical Genetics; Churchill Hospital; Oxford UK
17. Department of Clinical Genetics; Erasmus Medical Centre; Rotterdam The Netherlands
18. Institute of Human Genetics; International Centre for Life; Newcastle upon Tyne UK
19. Department of Paediatrics and Adolescent Medicine; Medical University of Graz; Graz Austria
20. Department of Clinical Genetics; VU University Medical Centre; Amsterdam The Netherlands
21. Institute of Medical Genetics; University Hospital of Wales; Cardiff UK
22. West Midlands Regional Genetics Service; Birmingham Women's Hospital; Birmingham UK
23. Centre de Génétique Humaine; Université de Franche-Comté; Besançon France
24. Human Genetics and Genomic Medicine; Faculty of Medicine; University of Southampton; Southampton UK