[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, Sch Med, Dept Pediat, Rochester, NY 14627 USA
[5] Natl Initiat Childrens Healthcare Qual, Boston, MA USA
[6] Univ Med & Dent New Jersey, New Jersey Med Sch, Newark, NJ 07103 USA
[7] Harvard Univ, Pilgrim Hlth Care, Dept Ambulatory Care & Prevent, Boston, MA 02115 USA
[8] Robert Wood Johnson Fdn, Princeton, NJ 08540 USA
[9] Brown Univ, Women & Infants Hosp, Providence, RI USA
[10] Univ Michigan, Ann Arbor, MI 48109 USA
[11] Mt Sinai Sch Med, Div Gen Internal Med, New York, NY USA
[12] Merck & Co Inc, Outcomes Res & Management, West Point, PA USA
[13] Columbia Univ, New York, NY 10027 USA
[14] Virginia Commonwealth Univ, Dept Family Practice, Fairfax, VA USA
[15] Virginia Commonwealth Univ, Dept Prevent & Community Med, Fairfax, VA USA