1. Department of Pediatric Hematology and Oncology; University Children's Hospital Muenster; Muenster Germany
2. Gerhard Domagk Institute of Pathology; University of Muenster; Muenster Germany
3. Department of Orthopedic Surgery; University Hospital Muenster; Muenster Germany
4. Cells-in-Motion Cluster of Excellence (EXC 1003-CiM); University of Muenster; Muenster Germany