1 Department of Physical Medicine & Rehabilitation, Mayo Clinic Sports Medicine Center, Mayo Clinic, W14, Mayo Building, 200 1st St SW, Rochester, MN 55905.
2 Departments of Radiology and Anatomy, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN.
3 Department of Physical Medicine and Rehabilitation, Department of Sports Medicine, Swedish Spine, Sports, and Musculoskeletal Medicine, Swedish Medical Group, Seattle, WA.
4 Department of Orthopaedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN.