1. Division of Genetics & Epidemiology, Institute of Cancer Research, Sutton, UK
2. Medical Genetics, St George's University of London, London, UK
3. Genetic Medicine, University of Manchester, Manchester, UK
4. Pediatric Genetics, University of New Mexico, Albuquerque, USA
5. Clinical Genetics, Guy's and St Thomas' Foundation Trust, London, UK
6. Northern Ireland Regional Genetics Service, Belfast City Hospital, Belfast, Northern Ireland, UK
7. Division of Neonatology, Department of Paediatrics, Medical University, Graz, Austria
8. Peninsula Clinical Genetics Service, Royal Devon and Exeter Foundation NHS Trust, Exeter, UK
9. Institute of Human Genetics, International Centre for Life, Newcastle upon Tyne, UK
10. Department of Paediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
11. Institute of Medical Genetics, University Hospital of Wales, Cardiff, UK
12. Division of Genetics, Nemours Children's Clinic, Orlando, USA
13. Human Genetics and Genomic Medicine, Faculty of Medicine, University of Southampton, Southampton, UK
14. West Midlands Regional Genetics Service, Birmingham Women's Hospital, Birmingham, UK