[1] Tufts Univ, Sch Med, Boston, MA USA
[2] MaineHlth Inst Res, Ctr Interdisciplinary Populat & Hlth Res, Portland, ME USA
[3] Maine Med Ctr, Dept Med, 22 Bramhall St, Portland, ME 04102 USA
[4] Univ Calif San Francisco, San Francisco Gen Hosp, Div HIV Infect Dis & Global Med, San Francisco, CA USA
[5] Univ Calif San Diego, Skaggs Sch Pharm & Pharmaceut Sci, Div Clin Pharm, La Jolla, CA USA
[6] Univ Calif San Diego, Div Black Diaspora & African Amer Studies, La Jolla, CA USA
[7] Oregon Hlth & Sci Univ, Dept Med, Sect Addict Med, Portland, OR USA
[8] Oregon Hlth & Sci Univ, Dept Care Management, Portland, OR 97201 USA
[9] Maine Access Points, Machias, ME USA
[10] Tufts Med, Dept Med, Div Geog Med & Infect Dis, Boston, MA USA