?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Fanning&rft.au=Fanning%2C+L&rft.aufirst=L&rft.title=Pharmacoepidemiology+%26+Drug+Safety&rft.pages=1550-1561&rft.issue=12&rft.date=December+2020&rft.atitle=Gastrointestinal+bleeding+risk+with+rivaroxaban+vs+aspirin+in+atrial+fibrillation%3A+a+multinational+study&rft.volume=29&rft.genre=article