?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Siddiqui%2C+MRS&rft.aufirst=MRS&rft.aulast=Siddiqui&rft.date=6+June+2017&rft.issue=12&rft.issn=1532-1827&rft.atitle=A+meta-analysis+comparing+the+risk+of+metastases+in+patients+with+rectal+cancer+and+MRI-detected+extramural+vascular+invasion+(mrEMVI)+vs+mrEMVI-negative+cases&rft.title=British+Journal+of+Cancer&rft.volume=116&rft.pages=1513-1519&rft.genre=article