Published on in Vol 7, No 6 (2019): June
1 Tobacco Research and Treatment Center, Division of General Internal Medicine, Massachusetts General Hospital, Boston, MA, United States
2 Institute for Research, Quality, and Policy in Homeless Health Care, Boston Health Care for the Homeless Program, Boston, MA, United States
3 Harvard Medical School, Boston, MA, United States
4 Department of Social and Behavioral Sciences, Harvard TH Chan School of Public Health, Boston, MA, United States
5 Section of General Internal Medicine, Department of Medicine, Boston University School of Medicine, Boston, MA, United States