1. RAND Corporation, 1776 Main Street, P.O. Box 2138, Santa Monica, CA 90407-2138, USA
2. Division of General Internal Medicine and Health Services Research, Department of Medicine, David Geffen School of Medicine, University of California, 911 Broxton Plaza, Los Angeles, CA, USA
3. Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
4. Olive View—UCLA Medical Center, Sylmar, CA, USA
5. Kaiser Permanente Medical Group, Fontana Medical Center, Fontana, CA, USA
6. Kaiser Permanente Medical Group, Yorba Linda, CA, USA
7. Section of Plastic Surgery, The University of Michigan School of Medicine, Ann Arbor, MI, USA
8. VA Greater Los Angeles Healthcare System, Los Angeles, CA, USA
9. Family Practice, Albany Memorial Hospital, Albany, NY, USA
10. Occupational Medicine, Kaiser Permanente, San Rafael, California, CA, USA
11. Neurology, La Jolla, CA, USA
12. Physical Medicine and Rehabilitation, University of California, Davis, CA, USA; recently deceased
13. Orthopedics, Burlingame, CA, USA
14. Hand Surgery, University of Chicago, Chicago, IL, USA
15. Hand Surgery, Birmingham, AL, USA
16. Hand Surgery, Wichita, KS, USA
17. Physical Therapy, Kaiser Permanente, Harbor City, CA, USA
18. Orthopedics, Hollywood, FL, USA