[1] Harvard Med Sch, Dept Hlth Care Policy, Hlth Care Policy & Med, Boston, MA 02115 USA
[2] Brigham & Womens Hosp, Div Gen Internal Med, 75 Francis St, Boston, MA 02115 USA
[3] Harvard Med Sch, Dept Hlth Care Policy, Hlth Care Policy, Boston, MA 02115 USA
[4] Harvard Med Sch, Dept Hlth Care Policy, Boston, MA 02115 USA
[5] Harvard Med Sch, Med, Boston, MA 02115 USA
[6] Dana Farber Canc Inst, Med Oncol & Populat Sci, Boston, MA 02115 USA
[7] Kaiser Permanente Northwest, Ctr Hlth Res, Portland, OR USA
[8] Indiana Univ Sch Med, Med, Indianapolis, IN 46202 USA
[9] Indianapolis Vet Affairs Med Ctr, Indianapolis, IN USA