Affiliation: | 1. Institute of Human Genetics, University of Bonn, Bonn, Germany;2. Correspondence to:;3. Dr. Hartmut Engels, Ph.D., Institute of Human Genetics, University of Bonn, Sigmund‐Freud‐Strasse 25, 53105 Bonn, Germany.;4. E‐mail:;5. Institut für Humangenetik, Universit?tsklinikum Essen, Universit?t Duisburg‐Essen, Essen, Germany;6. Institute of Human Genetics, Medical Faculty, Heinrich‐Heine‐University, Düsseldorf, Germany;7. Nottingham Clinical Genetics Service, Nottingham University Hospitals NHS Trust, City Hospital Campus, Nottingham, United Kingdom;8. Medical Genetics Unit, University of Siena, Siena, Italy;9. Department of Radiology, University of Bonn, Bonn, Germany;10. Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany;11. Laboratory of Medical Genetics, H?pital Jeanne de Flandre University Hospital, Lille, France;12. Clinical Genetics, H?pital Jeanne de France University Hospital, Lille, France |