?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=M.A.&rft.aulast=Alhammad&rft.au=Alhammad%2C+M.A.&rft.issn=22778616&rft.atitle=Clarithromycin+resistance+and+genetic+pattern+of+helicobacter+pylori+in+a+group+of+patients+with+peptic+ulcer+disease+in+alexandria%2C+Egypt&rft.title=International+Journal+of+Scientific+and+Technology+Research&rft.date=2019&rft.pages=149-159&rft.volume=8&rft.issue=3&rft.genre=article