1. Department of Pediatrics; Academic Medical Center; Amsterdam The Netherlands
2. Department of Clinical Genetics; Leiden University Medical Center; Leiden The Netherlands
3. Department of Clinical Genetics; Academic Medical Center; Amsterdam The Netherlands
4. Center for Human Genetics; University Hospitals Leuven, KU Leuven; Leuven Belgium
5. Institute of Medical and Human Genetics; Charité-Universitätsmedizin Berlin; Berlin Germany
6. Department of Genetics, and INSERM U1211; University Hospital of Bordeaux; Bordeaux France
7. Institute of Cancer and Genomic Sciences; University of Birmingham; Birmingham United Kingdom
8. Clinical Genetics Unit; University of Birmingham; Birmingham United Kingdom
9. Department of Genetics; University Medical Center Groningen, University of Groningen; Groningen The Netherlands
10. Division of Genetics and Metabolism; Children's National Health System; Washington District of Columbia
11. Department of Translational Medical Science; Federico II University; Naples Italy
12. Genetics and Rare Diseases Research Division; Ospedale Pediatrico Bambino Gesù; Rome Italy
13. Department of Clinical Genetics; Cambridge University Hospitals; Cambridge United Kingdom
14. Department of Human Genetics; Leiden University Medical Center; Leiden The Netherlands
15. Department of Human Genetics; Radboud University Medical Center; Nijmegen The Netherlands