1. Experimental Oncology/Hematology, Department of Clinical Research, University of Bern, Bern, Switzerland,
2. Department of Hematology, Erasmus University Medical Center, Rotterdam, The Netherlands,
3. Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA;
4. Munich Leukemia Laboratory GmbH, Munich, Germany; and
5. Department of Medical Oncology, Inselspital, Bern University Hospital, Bern, Switzerland