[1] Univ Minnesota, Div Hlth Policy & Management, Sch Publ Hlth, 420 Delaware Ave Southeast, Minneapolis, MN 55455 USA
[2] Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Hlth Policy & Management, Chapel Hill, NC USA
[3] Yale Sch Med, Ctr Outcomes & Evaluat, New Haven, CT USA
[4] Boston Med Ctr, Dept Gen Internal Med, Boston, MA USA
[5] Univ Calif Berkeley, Dept Hlth Policy & Management, Sch Publ Hlth, Berkeley, CA USA