?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Howe%2C+Laurence+J&rft.aulast=Howe&rft.aufirst=Laurence+J&rft.date=9+June+2023&rft.issn=0300-5771&rft.atitle=Educational+attainment%2C+health+outcomes+and+mortality%3A+a+within-sibship+Mendelian+randomization+study&rft.title=International+Journal+of+Epidemiology&rft.genre=article