We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDelayed immunisation and risk of pertussis in infants: unmatched case-control study.AuthorsGrant, Cameron C; Roberts, Mavis; Scragg, Robert; Stewart, Joanna; Lennon, Diana; Kivell, Denise; Ford, Rodney; Menzies, RosaliePublicationBMJ (Clinical research ed.), 2003, Vol 326, Issue 7394, p852ISSN1756-1833Publication typeJournal ArticleDOI10.1136/bmj.326.7394.852