[1] Univ Duisburg Essen, Univ Hosp, Dept Bone Marrow Transplantat, Essen, Germany
[2] German Canc Consortium DKTK, Heidelberg, Germany
[3] Univ Duisburg Essen, Univ Hosp, Inst Transfus Med, Essen, Germany
[4] Univ Duisburg Essen, Inst Inorgan Chem, Essen, Germany
[5] Univ Duisburg Essen, Univ Hosp, Dept Neurol, Essen, Germany