1. Julius Wolff Institute and Center for Musculoskeletal Surgery; Charité - Universitätsmedizin Berlin; Germany
2. Berlin-Brandenburg Center for Regenerative Therapies; Charité - Universitätsmedizin Berlin; Germany
3. Department of Rheumatology and Clinical Immunology; Charité - Universitätsmedizin Berlin; Germany
4. Institute of Medical Immunology; Charité - Universitätsmedizin Berlin; Germany