1. 1Department of Musculoskeletal Tissue Regeneration, University of Würzburg, Würzburg, Germany.
2. 2University Hospital Heidelberg, Institute of Pathology, Heidelberg, Germany.
3. 3Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany.
4. 4University of Würzburg, Institute of Pathology, Comprehensive Cancer Center Mainfranken, Würzburg, Germany.
5. 5University Hospital Würzburg, IZKF Research Group Tissue Regeneration in Musculoskeletal Diseases, Würzburg, Germany.
6. 6Department of Internal Medicine I, Faculty of Medicine and Medical Center, University of Freiburg, Freiburg, Germany.
7. 7Orthopedic Department, Clinic König-Ludwig-Haus, University of Würzburg, Würzburg, Germany.
8. 8Department of Hematology and Immunology, Vrije Universiteit Brussel, Jette, Belgium.