1 Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh Medical Center, 3200 South Water Street, Pittsburgh, PA, 15203, USA.
2 Department of Orthopaedic Sport Medicine, Technical University Munich, Munich, Germany.
3 Department of Orthopedic Surgery, Oslo University Hospital, Oslo, Norway.
4 Division of Orthopaedic Surgery, McMaster University, Hamilton, Canada.
5 Division of Sports Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, USA.
6 Emory University School of Medicine, Brookhaven, GA, USA.
7 Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
8 Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh Medical Center, 3200 South Water Street, Pittsburgh, PA, 15203, USA. musahlv@upmc.edu.
9 Department of Trauma Surgery, University Hospital Zurich, Zurich, Switzerland.
10 Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA.