[1] Massachusetts Gen Hosp, Div Gen Internal Med, Boston, MA USA
[2] Harvard Med Sch, Boston, MA USA
[3] Boston Hlth Care Homeless Program, Inst Res Qual & Policy Homeless Hlth Care, Boston, MA USA
[4] Beth Israel Deaconess Med Ctr, Div Gen Med, Boston, MA USA
[5] Beth Israel Deaconess Med Ctr, Div Gen Med, Boston, MA USA
[6] 100 Cambridge St,16th Floor, Boston, MA 02114 USA