1. Department of Radiology, Hoag Memorial Hospital Presbyterian, Newport Beach, California.
2. Newport Harbor Radiology Associates, Newport Beach, California.
3. Department of Orthopaedic Surgery, University of California Irvine, Orange, California.
4. Department of Radiology, University of California San Francisco, San Francisco, California.
5. Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, California.