[1] Brown Univ, Sch Publ Hlth, Providence, RI 02904 USA
[2] Brown Univ, Dept Neurosci, Providence, RI 02904 USA
[3] Rhode Isl Hosp, Harm Reduct Innovat Lab, Providence, RI USA
[4] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD USA
[5] Brown Univ, Sch Publ Hlth, Dept Epidemiol, Providence, RI 02904 USA
[6] Brown Univ, Warren Alpert Med Sch, Dept Med, Div Gen Internal Med, Providence, RI 02904 USA
[7] Brown Univ, Warren Alpert Med Sch, 1125 N Main St, Providence, RI 02904 USA