?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Pugh&rft.aufirst=Stirling&rft.au=Pugh%2C+Stirling&rft.date=1990&rft.tpages=326&rft.title=Endogenous+Prostaglandin+E2+in+Human+and+Experimental+Duodenal+Ulceration&rft.inst=UCL+(University+College+London)&rft.degree=Doctoral