We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCochrane Column.AuthorsTaryn Young; L Stead; T Lancaster; Derek Yach; Yussuf SaloojeePublicationInternational Journal of Epidemiology, 2006, Vol 35, Issue 1, p31ISSN0300-5771Publication typeAcademic JournalDOI10.1093/ije/dyi280