[1] Univ Munich, Klinikum Grosshadern, D-8000 Munich, Bavaria, Germany
[2] Helmholtz Ctr, Dept Med 3, Munich, Bavaria, Germany
[3] Clin Cooperat Grp Leukemia, Munich, Bavaria, Germany
[4] Univ Ulm, Inst Expt Canc Res, D-89069 Ulm, Germany
[5] Univ Tubingen, Inst Pathol, D-72074 Tubingen, Germany
[6] BC Canc Agcy, Terry Fox Lab, Vancouver, BC, Canada
[7] Univ Hosp Ulm, Dept Internal Med 3, Ulm, Germany