?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Khorana%2C+AA&rft.aulast=Khorana&rft.aufirst=AA&rft.pages=720-728&rft.date=21+February+2019&rft.volume=380&rft.issn=0028-4793&rft.atitle=Rivaroxaban+for+Thromboprophylaxis+in+High-Risk+Ambulatory+Patients+with+Cancer&rft.title=New+England+Journal+of+Medicine&rft.genre=article