1. The Hospital for Special Surgery, New York, New York 10021
2. Orthopaedic and Trauma Surgeons, Somersworth, New Hampshire 03878
3. Walter Reed Army Medical Center, Washington, DC 20307-5001
4. The Hospital for Special Surgery
5. Laboratory for Comparative Orthopaedic Research, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan 48824-1314