1. Center for Human Genetics, Katholieke Universiteit Leuven, Leuven, Belgium;
2. VIB Department of Molecular and Developmental Genetics, VIB, Leuven, Belgium;
3. Morphology and Molecular Pathology Section, University Hospitals Leuven, Leuven, Belgium;
4. Laboratory of Hematology, AZ St Jan AV, Brugge, Belgium;
5. Department of Pathology, AZ St Jan AV, Brugge, Belgium; and
6. Department of Hematology, University Hospitals Leuven, Leuven, Belgium