[1] Univ Colorado, Dept Med, Div Gen Internal Med, Denver, CO USA
[2] Univ Colorado, Hlth Sci Ctr, Denver, CO USA
[3] Denver Hlth Med Ctr, Div Cardiol, Dept Med, Denver, CO USA
[4] Johns Hopkins Univ, Sch Med, Div Internal Med, Baltimore, MD USA
[5] Johns Hopkins Univ Hosp, Div Cardiol, Baltimore, MD 21287 USA
[6] Johns Hopkins Bayview Med Ctr, Div Cardiol, Baltimore, MD USA
[7] Univ Colorado, Colorado Hlth Outcomes Program, Denver, CO 80202 USA
[8] Johns Hopkins Univ, Dept Hlth Policy & Management, Bloomberg Sch Publ Hlth, Baltimore, MD 21218 USA