?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Morris&rft.au=Morris%2C+TP&rft.aufirst=TP&rft.pages=261-283&rft.title=Journal+of+Clinical+Epidemiology&rft.date=February+2022&rft.atitle=Causal+analyses+of+existing+databases%3A+The+importance+of+understanding+what+can+be+achieved+with+your+data+before+analysis+(commentary+on+Hern%C3%A1n)&rft.volume=142&rft.genre=article