[1] Univ Heidelberg, Fak Klin Med Mannheim, Med Univ Klin 3, D-6800 Mannheim, Germany
[2] Univ Munich, Klinikum Grosshadern, Med Klin & Poliklin 3, D-8000 Munich, Germany
[3] Humboldt Univ, Charite, Robert Rossle Klin, Abt Hamatol Onkol & Tumorimmunol, D-1086 Berlin, Germany
[4] Klinikum Mannheim, Inst Klin Radiol, Mannheim, Germany