We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDon’t split your data.AuthorsKällberg, Henrik; Alfredsson, Lars; Feychting, Maria; Ahlbom, AndersPublicationEuropean Journal of Epidemiology, 2010, Vol 25, Issue 5, p283ISSN0393-2990Publication typearticleDOI10.1007/s10654-010-9447-3