TI - PErtussis and the dtap vaccine PT - JOUR DP - 2009 TA - Archives of Pediatrics & Adolescent Medicine pages = {496}, VI - 163 IP - 5 AID - 10.1001/archpediatrics.2009.62 [doi] 4100 - http://dx.doi.org/10.1001/archpediatrics.2009.62 SO - Archives of Pediatrics & Adolescent Medicine May 4, 2009 163(5):496