1. Martin Luther-University Halle-Wittenberg, Institute of Medical Immunology, Halle, Germany
2. Department of Applied Tumor Biology, Institute of Pathology, University Hospital Heidelberg, Clinical Cooperation Unit Applied Tumor Biology, DKFZ (German Cancer Research Center), Heidelberg, Germany
3. Departments of Surgery and Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA