[1] Univ Heidelberg, Med Klin & Poliklin 5, D-69115 Heidelberg, Germany
[2] Univ Rotterdam Hosp, Dept Hematol, NL-3015 GD Rotterdam, Netherlands
[3] Univ Rotterdam Hosp, HOVON Data Ctr, NL-3015 GD Rotterdam, Netherlands
[4] Deutsch Krebsforschungszentrum, Zent Einheit Biostat, D-69120 Heidelberg, Germany
[5] Univ Bonn, Med Klin & Poliklin 1, D-53105 Bonn, Germany
[6] Univ Klin Frankfurt, Med Klin 3, D-60596 Frankfurt, Germany
[7] Univ Utrecht Hosp, Dept Hematol, NL-3584 CX Utrecht, Netherlands