[1] Yale New Haven Med Ctr, Ctr Outcomes Res & Evaluat, New Haven, CT USA
[2] Yale Univ, Sch Med, Dept Internal Med, Sect Cardiovasc Med, New Haven, CT 06510 USA
[3] Yale Univ, Sch Med, Dept Internal Med, Gen Internal Med Sect, New Haven, CT 06510 USA
[4] Yale Univ, Sch Med, Dept Obstet Gynecol & Reprod Sci, New Haven, CT 06510 USA
[5] Yale Univ, Sch Med, Dept Internal Med, Robert Wood Johnson Clin Scholars Program, New Haven, CT 06510 USA
[6] Univ Missouri, St Lukes Mid Amer Heart Inst, Kansas City, MO USA
[7] Baystate Med Ctr, Dept Med, Ctr Qual Care Res, Springfield, MA 01199 USA
[8] Tufts Univ, Sch Med, Boston, MA 02111 USA
[9] Yale Univ, Sch Publ Hlth, Dept Hlth Policy & Management, New Haven, CT USA