1. Center for Medical Genetics, Ghent University, Ghent, Belgium;
2. Cancer Biology and Genetics, Memorial Sloan-Kettering Cancer Center, New York, NY;
3. Department of Medicine, Weill Cornell Medical College, New York, NY;
4. Department for Biomedical Molecular Biology, Ghent University, Ghent, Belgium;
5. Centre for Human Genetics, University Hospital Leuven, Leuven, Belgium;
6. INSERM U563, Toulouse, France;
7. Department of Pediatric Hematology-Oncology and Stem Cell Transplantation, Ghent University Hospital, Ghent, Belgium; and
8. Department of Clinical Chemistry, Microbiology and Immunology, Ghent University, Ghent, Belgium