1. University of Texas Health Science Center at; Houston
2. Cedars-Sinai Medical Center; Los Angeles California
3. Spondylitis Association of America; Sherman Oaks California
4. Children's Hospital of Philadelphia; Philadelphia Pennsylvania
5. University of California; San Francisco
6. Oregon Health and Science University; Portland
7. University of Utah School of Medicine; Salt Lake City
8. National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH; Bethesda Maryland