1 Department of Internal Medicine, Division of Rheumatology and Immunology, Tennessee Valley Health Care System, Veterans Affairs Medical Center and Vanderbilt University Medical Center, Nashville, TN, USA.
2 Clinical and Translational Science Institute, University of Utah, Salt Lake City, UT, USA.
3 Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA.
4 Department of Pathology, University of Utah, Salt Lake City, UT, USA.
5 Study Design and Biostatistics Center, University of Utah, Salt Lake City, UT, USA.
6 Department of Internal Medicine, George E. Wahlen Veterans Affairs Medical Center, Salt Lake City, UT, USA.