[1] Harvard Univ, Div Gen Pediat, Childrens Hosp Boston, Dept Pediat,Sch Med, Boston, MA 02115 USA
[2] Univ Washington, Sch Publ Hlth, Dept Hlth Serv, Seattle, WA 98195 USA
[3] Fred Hutchinson Canc Res Ctr, Div Clin Res, Seattle, WA 98104 USA
[4] MidWest Clinicians Network Inc, Lansing, MI USA
[5] Univ Chicago, Ctr Diabet Res & Training, Chicago, IL 60637 USA
[6] Univ Evansville, Dunigan Family Dept Nursing & Hlth Sci, Evansville, IN USA
[7] Univ Chicago, Dept Med, Gen Internal Med Sect, Chicago, IL 60637 USA
[8] Univ Chicago, Ctr Hlth & Social Sci, Chicago, IL 60637 USA
[9] Univ Penn, Ctr Biostat & Epidemiol, Philadelphia, PA 19104 USA
[10] N Dakota State Univ, Coll Pharm Nursing & Allied Sci, Fargo, ND 58105 USA
[11] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Natl Childrens Study, Bethesda, MD USA
[12] Weill Cornell Med Coll, Dept Publ Hlth, Div Outcomes & Effectiveness Res, New York, NY USA