[1] Boston Med Ctr, Clin Addict Res & Educ Unit, Sect Gen Internal Med, Boston, MA USA
[2] Univ Pittsburgh, Sch Med, Pittsburgh, PA USA
[3] Boston Univ, Aram V Chobanian & Edward Avedisian Sch Med, Boston, MA USA
[4] Boston Univ, Dept Community Hlth Sci, Sch Publ Hlth, Boston, MA USA
[5] Massachusetts Dept Publ Hlth, Opioid Overdose Prevent Pilot Program, Boston, MA USA
[6] Boston Med Ctr, Clin Addict Res & Educ Unit, Sect Gen Internal Med, 801 Massachusetts Ave,Room 2045, Boston, MA 02118 USA