Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleThe Authors Reply.AuthorsEduardo Villamor; Pär Sparén; Sven CnattingiusPublicationAmerican Journal of Epidemiology, 2008, Vol 168, Issue 9, p1093ISSN0002-9262Publication typeArticleDOI10.1093/aje/kwn245