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2. Pseudodoxia Epidemica;Browne,1646
3. A comparison of the radiologic and esophagoscopic diagnosis of esophageal varices;Conn;N. Engl. J. Med.,1961
4. Observer variation in reports on electrocardiograms;Davies;Br. Heart J.,1958
5. Peer review in biliary tract surgery;deRouville;N.Y. State J. Med.,1970