1. Research and Development and Division of Gastroenterology, Veterans Affairs Puget Sound Health Care System, and Division of Gastroenterology, University of Washington, Seattle, Washington (G.N.I.)
2. Research and Development, Veterans Affairs Puget Sound Health Care System, Seattle, Washington (K.B.)
3. Veterans Affairs Cooperative Studies Program Clinical Epidemiology Research Center (CSP-CERC), Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut, and Yale Center for Medical Informatics, Yale School of Medicine, New Haven, Connecticut (N.R., P.M.)
4. Veterans Affairs Cooperative Studies Program Clinical Epidemiology Research Center (CSP-CERC), Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut (Y.L.)
5. Veterans Affairs Cooperative Studies Program Clinical Epidemiology Research Center (CSP-CERC), Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut, and Department of Biostatistics, Yale School of Public Health, New Haven, Connecticut (L.Y.)
6. Veterans Affairs Portland Health Care System, Portland, Oregon (D.B.)
7. Veterans Affairs Center for Medication Safety - Pharmacy Benefit Management (PBM) Services, Hines, Illinois (F.C.)
8. Center of Innovation to Improve Veteran Involvement in Care (CIVIC), Veterans Affairs Portland Healthcare System, Portland, Oregon; Health Management and Policy, School of Social and Behavioral Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, Oregon; and Health Data and Informatics Program, Center for Quantitative Life Sciences, Oregon State University, Corvallis, Oregon (D.M.H.)
9. Center of Innovation to Improve Veteran Involvement in Care (CIVIC), Veterans Affairs Portland Healthcare System, Portland, Oregon (M.R.)
10. Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, and Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan (A.B.)
11. Seattle Epidemiologic Research and Information Center, Veterans Affairs Puget Sound Health Care System, Seattle, Washington (E.J.B.)
12. Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan, and Schools of Medicine and Public Health, Johns Hopkins University, Baltimore, Maryland (T.J.I.)
13. Center of Innovation to Accelerate Discovery and Practice Transformation, Durham Veterans Affairs Medical Center; Department of Population Health Sciences, Duke University School of Medicine; and Duke-Margolis Center for Health Policy, Duke University, Durham, North Carolina (M.L.M.)
14. Veterans Affairs Palo Alto Health Care System, Palo Alto, California, and Department of Radiology, Stanford University School of Medicine, Stanford, California (T.F.O.)
15. Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan (E.M.V.)
16. Veterans Affairs Cooperative Studies Program Clinical Epidemiology Research Center (CSP-CERC), Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut, and Department of Medicine, Yale School of Medicine, New Haven, Connecticut (M.A.)
17. Office of Research and Development, Veterans Health Administration, Washington, DC (G.D.H.)
18. Veterans Affairs Portland Health Care System, and Division of Infectious Diseases, Department of Medicine, Oregon Health & Science University, Portland, Oregon (K.L.B.).