[1] Univ Colorado, Div Gen Internal Med, Sch Med Ctr, Dept Med, Aurora, CO USA
[2] Univ Colorado, Div Subst Dependence, Sch Med Ctr, Dept Psychiat, Aurora, CO USA
[3] Denver Hlth Med Ctr, Community Hlth Serv, Denver, CO USA
[4] Univ Alabama Birmingham, Div Prevent Med, Birmingham, AL USA
[5] Brigham & Womens Hosp, Div Gen Med & Primary Care, Boston, MA 02115 USA
[6] Brigham & Womens Hosp, Div Med Commun, Boston, MA 02115 USA
[7] Harvard Univ, Sch Med, Dept Med, Boston, MA USA
[8] Kaiser Permanente, Inst Hlth Res, Denver, CO USA
[9] Univ Massachusetts, Med Ctr, Div Hosp Med, Worcester, MA USA
[10] Brigham & Womens Hosp, Div Gen Internal Med, Boston, MA 02115 USA
[11] Harvard Univ, Sch Med, Dept Hlth Care Policy, Boston, MA 02115 USA
[12] Univ Colorado, Div Gen Internal Med, Sch Med, Aurora, CO USA