[1] Boston Hlth Care Homeless Program, Inst Res Qual & Policy Homeless Hlth Care, Boston, MA 02118 USA
[2] Boston Univ, Sch Med, Sect Gen Internal Med, Boston, MA 02118 USA
[3] Brown Univ, Sch Publ Hlth, Ctr Hlth Promot & Hlth Equ, Providence, RI USA
[4] Fenway Inst, Boston, MA USA
[5] Univ Calif San Diego, Herbert Wertheim Sch Publ Hlth & Human Longev Sci, San Diego, CA 92103 USA