1. Department of Orthopedics Wake Forest University, Winston Salem, North Carolina, USA.
2. Department of Orthopedics, The Ohio State University, Columbus, Ohio, USA.
3. Department of Radiology, Creighton University, Phoenix, Arizona, USA.
4. Department of Orthopedics, University of Colorado, Aurora, Colorado, USA.
5. Department of Orthopedic Surgery, Mayo Clinic Arizona, Phoenix, Arizona, USA.