Frakt Austin B, Carroll Aaron E, Pollack Harold A, Humphreys Keith
VA Boston Healthcare System, Boston University School of Public Health, Harvard TH Chan School of Public Health, Boston, MA.
Indiana University School of Medicine, Indianapolis, IN.
Health Serv Res. 2018 Oct;53(5):3278-3284. doi: 10.1111/1475-6773.12858. Epub 2018 May 2.