1. Department of Hematology, Oncology and Cancer Immunology, Charité─Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, D-12203 Berlin, Germany
2. Faculty of Pharmacy, University of Ljubljana, Aškerčeva Cesta 7, SI-1000 Ljubljana, Slovenia
3. German Cancer Consortium (DKTK) Partner Site Berlin and German Cancer Research Center (DKFZ), D-69120 Heidelberg, Germany
4. Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, United States
5. Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02215, United States
6. Phamaceutical Institute, Department of Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany