[1] Yale Univ, Sch Med, Dept Diagnost Radiol, Invest Med Program, New Haven, CT 06520 USA
[2] Yale Univ, Sch Med, Robert Wood Johnson Fdn Clin Scholars Program, Sect Gen Internal Med,Dept Internal Med, New Haven, CT 06520 USA
[3] Yale Univ, Sch Publ Hlth, Dept Hlth Policy & Management, New Haven, CT 06520 USA
[4] Yale New Haven Med Ctr, Ctr Outcomes Res & Evaluat, New Haven, CT 06504 USA