1. Department of Sports Orthopaedics, Technical University of Munich, Germany
2. Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU, Munich, Germany
3. Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, USA
4. Massachusetts General Hospital, Massachusetts General Brigham, Harvard Medical School, Boston, Massachusetts, USA