1. Section of General Internal Medicine, Veterans Affairs Boston Healthcare System, Boston, Massachusetts2Massachusetts Veterans’ Epidemiology Research and Information Center, Veterans Affairs Boston Healthcare System, Boston3Harvard Medical School, Boston,
2. Healthcare Financing and Economics, Veterans Affairs Boston Healthcare System, Boston, Massachusetts5Boston University School of Medicine and School of Public Health, Boston, Massachusetts
3. Section of General Internal Medicine, Veterans Affairs Boston Healthcare System, Boston, Massachusetts3Harvard Medical School, Boston, Massachusetts6Division of General Internal Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
4. Healthcare Financing and Economics, Veterans Affairs Boston Healthcare System, Boston, Massachusetts7Northeastern University, Boston, Massachusetts