[1] Univ Washington, Dept Family Med, Seattle, WA 98195 USA
[2] Univ Texas, Hlth Sci Ctr, Sch Nursing, San Antonio, TX 78284 USA
[3] Tri Cty Family Med, Cohocton, NY USA
[4] Univ Rochester, Rochester, NY 14627 USA
[5] Natl Initiat Childrens Healthcare Qual, Boston, MA USA
[6] Harvard Pilgrim Hlth Care, Dept Ambulatory Care & Prevent, Boston, MA USA
[7] Harvard Univ, Sch Med, Boston, MA USA
[8] Univ Texas, Hlth Sci Ctr, Audie L Murphy Mem Vet Hosp, San Antonio, TX 78284 USA
[9] Robert Wood Johnson Fdn, Princeton, NJ 08540 USA
[10] Brown Univ, Women & Infants Hosp, Providence, RI 02908 USA
[11] Univ Michigan, Sch Nursing, Ann Arbor, MI 48109 USA
[12] Dartmouth Hitchcock Med Ctr, Dept Med, Lebanon, NH 03766 USA
[13] Merck & Co Inc, Outcomes Res & Management, W Point, PA USA
[14] Columbia Univ Coll Phys & Surg, Dept Obstet & Gynecol, New York, NY 10032 USA
[15] Med Coll Virginia, Dept Family Practice, Fairfax, VA USA