[1] Univ Wurzburg, Wurzburg, Germany
[2] Tech Univ Munich, Inst Pathol, Munich, Germany
[3] Stanford Univ, Div Blood & Marrow Trabsplantat, Stanford, CA 94305 USA
[4] Stanford Univ, Div & Blood Marrow Transplantat, Standford, Germany
[5] Univ Wurzburg, Interdisciplinary Ctr Clin Res, Wurzburg, Germany