1. Division of Rheumatology, Department of Internal Medicine, University of Utah, 4B200 SOM, 30 North 1900 East, Salt Lake City, UT 84132, USA
2. Department of Internal Medicine, University of Utah, Salt Lake City, UT 84132, USA
3. Department of Medicine, Salt Lake City Veterans Affairs Medical Center and the University of Utah, 50 North Medical Drive, Salt Lake City, UT 84132, USA