[1] Univ Hosp Essen, Dept Hematol, Essen, Germany
[2] Univ Duisburg Essen, Inst Cell Biol Canc Res, Essen, Germany
[3] Univ Hosp Essen, Inst Med Informat Biometry & Epidemiol, Essen, Germany
[4] Univ Duisburg Essen, Inst Cell Biol Tumor Res, Essen, Germany