Affiliation: | 1. Department of Veterans Affairs Eastern Colorado Healthcare System, Department of Medicine, University of Colorado-Denver, Denver, CO;2. Veterans Integrated Service Network 19, Denver, CO;3. Department of Veterans Affairs Eastern Colorado Healthcare System, Denver, CO;4. Department of Veterans Affairs, Salt Lake City Healthcare System, Salt Lake City, UT;5. Division of Infectious Diseases, Department of Internal Medicine, University of Utah, School of Medicine, Salt Lake City, UT |