Ruddell, W S The diagnostic yield of ERCP in the investigation of unexplained abdominal pain. [electronic resource] - The British journal of surgery Feb 1983 - 74-5 p. digital Publication Type: Journal Article ISSN: 0007-1323 Standard No.: 10.1002/bjs.1800700206 doi Subjects--Topical Terms: AbdomenAdultAgedAlcoholism--complicationsCholangiopancreatography, Endoscopic RetrogradeChronic DiseaseDigestive System Diseases--diagnostic imagingFemaleHumansMaleMiddle AgedPain--diagnostic imagingRadiography, Abdominal