[1] Univ Wisconsin, Sch Med, Dept Med, Madison, WI 53705 USA
[2] Univ Wisconsin, Dept Family Med, Madison, WI USA
[3] Univ Wisconsin, Dept Biostat, Madison, WI USA
[4] Univ N Carolina, Cecil G Sheps Ctr Hlth Serv Res, Program Primary Care & Hlth Profess, Chapel Hill, NC USA
[5] Univ Alabama, Dept Mkt & Management, Tuscaloosa, AL USA
[6] NYU, Dept Med, Primary Care Div, New York, NY USA
[7] Oregon Hlth Sci Univ, Dept Med, Portland, OR 97201 USA
[8] Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Gen Internal Med, Boston, MA 02115 USA
[9] SGIM ER, Washington, DC USA