1. Division of Sports Medicine, Department of Orthopaedic Surgery, University of Toledo Medical Center, Toledo, Ohio, USA.
2. Department of Orthopaedic Surgery, Naval Medical Center San Diego, San Diego, California, USA.
3. Department of Orthopaedic Surgery, Monroe Carell Jr Children's Hospital at Vanderbilt, Nashville, Tennessee, USA.
4. Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina, USA.
5. James R. Urbaniak, MD, Sports Sciences Institute, Durham, North Carolina, USA.