[1] Univ Washington, Harborview Med Ctr, Dept Med, Div Gen Internal Med, Box 359780,325 9Th Ave, Seattle, WA 98104 USA
[2] Univ Washington, Dept Psychiat & Behav Sci, Seattle, WA USA
[3] Boston Univ, Sect Gen Internal Med, Chobanian & Avedisian Sch Med, Dept Med,Clin Addict Res & Educ CARE Unit, Boston, MA USA
[4] Boston Med Ctr, Boston, MA USA