1. Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 47057 Duisburg, Germany
2. Northern Ireland Regional Genetics Service, Belfast City Hospital, Belfast BT9 7AB, UK
3. Limbach Genetics, 28209 Bremen, Germany
4. Medical Genetics and Applied Genomics, University of Tuebingen, 72076 Tuebingen, Germany
5. Department of Pediatrics, Faculty of Medicine, Ruhr University of Bochum, 44791 Bochum, Germany
6. Center for Rare Disease Essen (Essener Zentrum für Seltene Erkrankungen—EZSE), Universitätsmedizin Essen, 45147 Essen, Germany