[1] Yale Sch Med, Dept Lab Med, 55 Pk St,PS215, New Haven, CT 06511 USA
[2] Yale New Haven Med Ctr, Ctr Outcomes Res & Evaluat, 20 York St, New Haven, CT 06504 USA
[3] Yale New Haven Med Ctr, Informat Technol Serv, 20 York St, New Haven, CT 06504 USA
[4] Yale Sch Med, Dept Pediat, New Haven, CT 06511 USA
[5] Yale Sch Med, Dept Internal Med, Sect Cardiovasc Med, New Haven, CT 06511 USA
[6] Yale Sch Publ Hlth, Dept Hlth Policy & Management, New Haven, CT USA