1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Washington, Seattle, Washington
2. Veterans Affairs Connecticut Healthcare System and Section of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yale University Schools of Medicine and Public Health, New Haven, Connecticut
3. Division of Infection Diseases, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
4. Atlanta Veterans Affairs Medical Center and Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
5. Veterans Affairs Greater Los Angeles Healthcare System and the Infectious Diseases Section, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California
6. Section of Infectious Diseases, Veterans Affairs Medical Center, and Department of Medicine, George Washington University, Washington, D.C
7. Veterans Affairs Pittsburgh Healthcare System and Infectious Diseases, Department of Internal Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
8. Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, Ohio
9. Veterans Affairs Medical Center, Cincinnati, Ohio