?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Morris&rft.aufirst=Tim+T&rft.au=Morris%2C+Tim+T&rft.date=December+2022&rft.issue=6&rft.issn=0300-5771&rft.atitle=Interpretation+of+Mendelian+randomization+using+a+single+measure+of+an+exposure+that+varies+over+time&rft.title=International+Journal+of+Epidemiology&rft.volume=51&rft.pages=1899-1909&rft.genre=article