1. Department of Orthopaedic Surgery, Park Nicollet Methodist Hospital, St. Louis Park
2. Department of Orthopaedic Surgery, TRIA Orthopaedic Institute, Bloomington
3. Department of Orthopaedic Surgery, Des Moines University College of Osteopathic Medicine, Des Moines, IA
4. Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN
5. Department of Orthopaedic Surgery, University of Washington, Seattle, WA