1. Center for Access & Delivery Research and Evaluation (CADRE), Iowa City Veterans Affairs Healthcare System, Iowa City, Iowa
2. Division of Infectious Diseases, University of Iowa Carver College of Medicine, Iowa City
3. Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey Veterans Affairs Medical Center, Houston, Texas
4. Baylor College of Medicine, Houston, Texas
5. Department of Anesthesiology, Yale School of Medicine, New Haven, Connecticut
6. Department of Environmental Health Sciences, Yale School of Public Health, New Haven, Connecticut