1. Department of Bone Marrow Transplantation; West German Cancer Centre; University Hospital of Essen; Essen Germany
2. Department of Medicine A; University Hospital of Muenster; Muenster Germany
3. Department of Medicine V; University Hospital Heidelberg; Heidelberg Germany
4. Cluster of Excellence EXC 1003; Cells in Motion; Muenster Germany
5. Translational Oncology; University Hospital Muenster; Muenster Germany