[1] Univ Washington, Dept Family Med, Seattle, WA 98195 USA
[2] Univ Maryland, Sch Nursing, Baltimore, MD 21201 USA
[3] Tri Cty Family Med, Cohocton, NY USA
[4] Univ Rochester, Rochester, NY USA
[5] Natl Initiat Childrens Healthcare Qual, Boston, MA USA
[6] Univ Med & Dent New Jersey, New Jersey Med Sch, Dept Family Med, Newark, NJ 07103 USA
[7] Univ Rochester, Sch Med, Dept Pediat, Rochester, NY 14642 USA
[8] Harvard Pilgrim Hlth Care, Dept Ambulatory Care & Prevent, Boston, MA USA
[9] Harvard Univ, Sch Med, Boston, MA USA
[10] Univ Texas, Hlth Sci Ctr, Dept Med, San Antonio, TX 78284 USA
[11] Robert Wood Johnson Fdn, Princeton, NJ 08540 USA
[12] Brown Univ, Women & Infants Hosp, Providence, RI USA
[13] Univ Michigan, Ann Arbor, MI 48109 USA
[14] Mt Sinai Sch Med, Div Gen Internal Med, New York, NY USA
[15] Merck & Co Inc, Outcomes Res & Management, West Point, PA USA
[16] Columbia Univ, New York, NY USA
[17] Dept Family Practice, Fairfax, VA USA
[18] Dept Community & Prevent Med, Fairfax, VA USA