1. Clinics of Hematology and Medical OncologyUniversity Medical Center Göttingen Göttingen Germany
2. Department of Hematology and Medical Oncology IIITechnische Universität München Munich Germany
3. MLL Munich Leukemia Laboratory Munich Germany
4. Department of Hematology, Oncology and Clinical ImmunologyHeinrich‐Heine‐Universität Düsseldorf Germany
5. Metropolitan Research and Treatment Center for Blood Disorders (MRTC Japan) Tokyo Japan
6. Institute of Human Genetics and Anthropology, Heinrich‐Heine‐Universität Düsseldorf Germany
7. Josep Carreras Leukemia Research Institute (IJC), ICO‐Hospital GermansTrias i Pujol, Universitat Autonòma de Barcelona Barcelona Spain
8. Division of Hematology, Oncology and Stem Cell TransplantationUniversity of Freiburg Freiburg Germany
9. Medical Clinic and Policlinic 1, Hematology and Cellular TherapyLeipzig University Hospital Leipzig Germany
10. Center for Human GeneticsUniversity Hospitals Leuven Leuven Belgium
11. Department of Human GeneticsHannover Medical School Hannover Germany
12. Onkologie Köln, Outpatient Clinic for Hematology and Oncology Köln Germany
13. Department of Stem Cell TransplantationUniversity of Hamburg‐Eppendorf Hamburg Germany
14. Outpatient Clinic for Hematology and Oncology Kassel Germany
15. Département d'hématologie biologiqueHôpital Pasteur Nice France