[1] Tufts Med Ctr, Dept Med, Boston, MA 02111 USA
[2] Tufts Med Ctr, Inst Clin Res & Hlth Policy Studies, Boston, MA 02111 USA
[3] Univ Calif San Francisco, Dept Family & Community Med, San Francisco, CA USA
[4] Univ Calif San Francisco, Ctr Hlth & Community, Social Intervent Res & Evaluat Network, San Francisco, CA 94143 USA
[5] Univ Calif San Francisco, Ctr Hlth & Community, Med Psychol, San Francisco, CA 94143 USA
[6] Providence VA Med Ctr, Providence, RI USA
[7] Brown Univ, Dept Family Med, Providence, RI 02912 USA
[8] Brown Univ, Sch Publ Hlth, Dept Hlth Serv Policy & Practice, Providence, RI 02912 USA
[9] NYU, Ronald O Perelman Dept Emergency Med, New York, NY USA
[10] NYU, Dept Populat Hlth, New York, NY USA
[11] Boston Univ, Sch Med, Dept Pediat, Boston, MA 02118 USA
[12] Boston Childrens Hosp, Div Emergency Med, Boston, MA USA
[13] Harvard Med Sch, Pediat & Emergency Med, Boston, MA 02115 USA
[14] Columbia Univ, Dept Emergency Med, Vagelos Coll Phys & Surg, New York, NY USA
[15] Univ Colorado, Div Gen Internal Med, Sch Med, Aurora, CO USA
[16] Univ Colorado, Ctr Womens Hlth Res, Sch Med, Aurora, CO USA
[17] Univ Chicago, Dept Obstet & Gynecol, Chicago, IL 60637 USA
[18] Univ Chicago, Dept Med Geriatr, Chicago, IL 60637 USA
[19] Univ Chicago, Sect Gen Internal Med, Chicago, IL 60637 USA
[20] Univ San Francisco, Dept Emergency Med, San Francisco, CA USA
[21] Hennepin Cty Med Ctr, Upstream Hlth Innovat, Minneapolis, MN 55415 USA
[22] La Familia Med Ctr, Santa Fe, NM USA
[23] Dartmouth Coll, Geisel Sch Med, Dept Pediat, Hanover, NH 03755 USA
[24] Dartmouth Coll, Geisel Sch Med, Dept Community & Family Med, Hanover, NH 03755 USA
[25] Childrens HealthWatch, Boston, MA USA