[1] Yale Univ, Sch Med, Dept Internal Med, Sect Cardiovasc Med, New Haven, CT 06520 USA
[2] Yale Univ, Sch Med, Dept Internal Med, Robert Wood Johnson Clin Scholars Program, New Haven, CT 06520 USA
[3] Yale Univ, Sch Med, Sch Publ Hlth, Sect Hlth Policy & Adm, New Haven, CT 06520 USA
[4] Yale Univ, New Haven Hosp, Ctr Outcomes Res & Evaluat, New Haven, CT USA
[5] Harvard Univ, Sch Med, Dept Hlth Care Policy, Boston, MA 02115 USA
[6] Harvard Univ, Sch Publ Hlth, Dept Biostat, Boston, MA 02115 USA