[1] Kaiser Permanente, W Los Angeles Med Ctr, Los Angeles, CA USA
[2] Yale New Haven Med Ctr, Ctr Outcomes Res & Evaluat, New Haven, CT 06504 USA
[3] Yale Univ, Sch Med, Sect Cardiovasc Med, New Haven, CT USA
[4] Yale Univ, Sch Med, Dept Med, Robert Wood Johnson Clin Scholars Program, New Haven, CT 06510 USA