1. Phoenix Indian Medical Center and Phoenix Clinical Research Section, National Institute of Arthritis, Metabolism, and Digestive Diseases, Phoenix, Ariz., and the Departments of Medicine, University of California School of Medicine, Los Angeles and San Francisco, Calif.
2. Phoenix indian Medical Center, Phoenix, Ariz.
3. Division of Rheumatology, Department of Medicine, University of California School of Medicine, Los Angeles, Calif.; formerly Clinical Associate, National Institute of Arthritis,Metabolism, and Digestive Disorders, Phoenix Clinical Research Section, Phoenix, Ariz.
4. UCLA Medical Center, University of California, Los Angeles, Calif.
5. University of California Medical School, San Francisco, Calif.