1. Julius Wolff Institute, Charité—Universitätsmedizin Berlin, Berlin, Germany.
2. Center for Musculoskeletal Surgery, Charité—Universitätsmedizin Berlin, Berlin, Germany.
3. Berlin-Brandenburg Center for Regenerative Therapies, Charité—Universitätsmedizin Berlin, Berlin, Germany.
4. Berlin-Brandenburg School for Regenerative Therapies, Charité—Universitätsmedizin Berlin, Berlin, Germany.