1. Department of Medical Imaging, The University of Arizona, College of Medicine, Tucson, Arizona
2. Department of Radiology, University of New Mexico, Albuquerque, New Mexico
3. Department of Radiology, Northwestern Memorial Hospital, Chicago, Illinois
4. Department of Orthopaedics and Rehabilitation, University of New Mexico, Albuquerque, New Mexico
5. Department of Orthopaedic Surgery, University of Arizona, Tucson, Arizona