1. Southern California Orthopedic Institute, Van Nuys, California, Department of Orthopedic Surgery, University of California at Los Angeles
2. Center for Orthopedics, Sheffield Village, Ohio
3. NW Orthopaedic Physicians, Bellevue, Washington
4. Department of Orthopaedics, Division of Sports Medicine, North Shore University Hospital, Great Neck, New York
5. Kaiser Permanente, San Jose, California
6. San Fernando Valley MRI, Van Nuys, California
7. Lakeshore Orthopedics, Manitowoc, Wisconsin