[1] Univ Klinikum Giessen & Marburg, Dept Hematol Oncol & Immunol, Marburg, Germany
[2] Univ Heidelberg, Med Fac Mannheim, D-6800 Mannheim, Germany
[3] Univ Marburg, Dept Hematol, Marburg, Germany
[4] Univ Klinikum Jena, Dept Hematol Oncol, Jena, Germany