1. Institute of Human Genetics; University Hospital Magdeburg; Magdeburg Germany
2. Département de Génétique, Unité Institut National de la Santé et de la Recherche Médicale (INSERM) U781; Université Paris Descartes, Sorbonne Paris Cité, Hôpital Necker Enfants Malades; Paris Cedex France
3. Department of Medical Genetics; Pellegrin Hospital; Bordeaux France
4. Department of Medical Genetics; Jeanne de Flandre Hospital; Lille France
5. Department of Pediatrics; Keio University School of Medicine; Tokyo Japan
6. Department of Medical Genetics; Oslo University Hospital; Oslo Norway
7. Institute of Human Genetics; Johann Wolfgang Goethe University Hospital; Frankfurt/Main Germany
8. Medical Genetics Unit, Department of Pediatrics; University Hospital Rostock; Rostock Germany
9. Institute of Biology & Medical Genetics, Department of Clinical Genetics; Praha Czech Republic
10. Clinical Genetics, Guy's & St Thomas' Hospitals; London United Kingdom
11. West Midlands Regional Genetics Service, Clinical Genetics Unit; Birmingham Women's Hospital; West Midlands United Kingdom
12. Institute of Human Genetics; Universität Erlangen-Nürnberg; Erlangen Germany
13. Institute of Human Genetics; University Hospital Hamburg-Eppendorf; Hamburg Germany
14. Department of Pediatrics H7-236, Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands