[1] Yale Univ, Sch Med, Sect Cardiovasc Med, Dept Internal Med, New Haven, CT 06520 USA
[2] Yale Univ, Sch Med, Dept Epidemiol & Publ Hlth, Sect Hlth Policy & Adm, New Haven, CT 06520 USA
[3] Yale New Haven Med Ctr, Ctr Outcomes Res & Evaluat, New Haven, CT 06504 USA
[4] Colorado Fdn Med Care, Aurora, CO USA
[5] Qualidigm, Middletown, CT USA
[6] Univ Colorado, Hlth Sci Ctr, Div Cardiol, Dept Med,Denver Hlth Med Ctr, Denver, CO 80202 USA
[7] Univ Colorado, Hlth Sci Ctr, Div Geriatr Med, Dept Med, Denver, CO 80202 USA