[1] Univ Colorado, Sch Med, Dept Med, Div Gen Internal Med, Aurora, CO USA
[2] Univ Colorado, Div Hosp Med, Sch Med, Aurora, CO USA
[3] Yale Sch Med, Dept Med, New Haven, CT USA
[4] Johns Hopkins Sch Med, Div Addict Med, Baltimore, MD USA
[5] Johns Hopkins Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA
[6] Univ Colorado, Dept Med, Div Gen Internal Med, Sch Med, 8th Floor,Acad Off 1,Mailstop B180,12631 E 17th Av, Aurora, CO 80045 USA
[7] Univ Colorado, Div Hosp Med, Sch Med, 8th Floor,Acad Off 1,Mailstop B180,12631 E 17th Av, Aurora, CO 80045 USA