1. Department of Medicine, Hematology and Oncology and Interdisciplinary Center for Clinical Research (IZKF), University of Münster, Münster, Germany;
2. Department of Oncology and Hematology, University of Halle, Halle, Germany;
3. Sidney Kimmel Cancer Center, San Diego, CA; and
4. Bioinformatics Institute, University of Tübingen, Tübingen, Germany