1. Section of Rheumatology Boston University Chobanian & Avedisian School of Medicine Boston Massachusetts
2. Department of Radiology Massachusetts General Hospital and Harvard Medical School Boston Massachusetts
3. Radiology Boston University Chobanian & Avedisian School of Medicine Boston Massachusetts
4. University of California San Francisco
5. School of Public Health Boston University Boston Massachusetts
6. University of Iowa Iowa City
7. Department of Epidemiology University of Alabama at Birmingham Brimingham