[1] Yale Univ, Sch Med, Robert Wood Johnson Clin Scholars Program, New Haven, CT 06520 USA
[2] Yale Univ, Sch Med, Gen Internal Med Sect, Dept Med, New Haven, CT 06520 USA
[3] Yale Univ, Sch Med, Sect Cardiovas Med, New Haven, CT 06520 USA
[4] Yale Univ, Sch Med, Dept Med, New Haven, CT 06520 USA
[5] Yale New Haven Med Ctr, Ctr Outcomes Res & Evaluat, New Haven, CT 06504 USA
[6] St Vincents Heart Ctr, Indianapolis, IN USA
[7] Inst Healthcare Improvement, Dept Pediat, Cambridge, MA USA
[8] Childrens Hosp Boston, Dept Pediat, Boston, MA USA
[9] Harvard Univ, Sch Med, Boston, MA USA
[10] John Muir Hlth Syst, Dept Cardiol, Walnut Creek, CA USA
[11] Albert Einstein Coll Med, Montefiore Einstein Med Cardiovasc Ctr, Bronx, NY 10467 USA