1 Richard A. and Susan F. Smith Center for Outcomes Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA; Department of Internal Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.
2 Richard A. and Susan F. Smith Center for Outcomes Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA; Harvard Medical School, Boston, Massachusetts, USA.
3 Richard A. and Susan F. Smith Center for Outcomes Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
4 Richard A. and Susan F. Smith Center for Outcomes Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA; Department of Health Policy and Management, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA. Electronic address: rwadhera@bidmc.harvard.edu.