[1] Kaiser Permanente Colorado Inst Hlth Res, 16601 E Centretech Pkwy, Aurora, CO 80011 USA
[2] Univ Colorado, Sch Med, Dept Pediat, Aurora, CO USA
[3] Colorado Sch Publ Hlth, Dept Epidemiol, Aurora, CO USA
[4] Res & Evaluat, Kaiser Permanente Southern Calif, Pasadena, CA USA
[5] Kaiser Permanente Vaccine Study Ctr, Kaiser Permanente Northern Calif, Oakland, CA USA
[6] HealthPartners Inst, Minneapolis, MN USA
[7] Marshfield Clin Res Inst, Marshfield, WI USA
[8] Denver Hlth & Hosp, Dept Ambulatory Care Serv, Denver, CO USA
[9] Kaiser Permanente Washington, Hlth Res Inst, Seattle, WA USA
[10] Kaiser Permanente Northwest, Ctr Hlth Res, Portland, OR USA
[11] CDCP, Immunizat Safety Off, Atlanta, GA USA
[12] Natl Ctr Immunizat & Resp Dis, CDCP, Atlanta, GA USA