[1] Universitaetsmed Berlin, Charite, Dept Hematol Oncol & Transfus Med, Berlin, Germany
[2] Universitaetsmed Berlin, Charite, Inst Med Informat Biometry & Epidemiol, Berlin, Germany
[3] Universitaetsklinikum Essen, Essen, Germany
[4] Universitaetskrankenhaus Eppendorf, Hamburg, Germany
[5] Bruederkrankenhaus Trier, Trier, Germany
[6] Klinikum Aschaffenburg, Aschaffenburg, Germany
[7] Univ Munster, D-4400 Munster, Germany
[8] Klinikum Nord, Nurnberg, Germany
[9] Tech Univ Munich, Klinikum Rechts Isar, D-8000 Munich, Germany
[10] Klinikum Ernst Von Bergmann, Potsdam, Germany