1. William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin, USA
2. Division of Infectious Disease, Department of Medicine, University of Wisconsin School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
3. Informatics, Decision Enhancement, and Analytic Sciences Center of Innovation, Veterans Affairs (VA) Salt Lake City Health Care System, Salt Lake City, Utah, USA
4. Division of Epidemiology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, USA
5. National Infectious Diseases Service, Specialty Care Services, Veterans Health Administration, US Department of Veterans Affairs, Washington, DC, USA
6. Division of Infectious Diseases, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA