?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Silvia&rft.au=Moler-Zapata%2C+Silvia&rft.aulast=Moler-Zapata&rft.date=24+May+2022&rft.issn=0272-989X&rft.atitle=Local+Instrumental+Variable+Methods+to+Address+Confounding+and+Heterogeneity+when+Using+Electronic+Health+Records%3A+An+Application+to+Emergency+Surgery&rft.title=Medical+Decision+Making&rft.genre=article