title: ERCP without air bubbles.
mesh_terms: D001660:Biliary Tract Diseases / Q000000981:diagnostic imaging; D002758:Cholangiography / Q000295:instrumentation*; D019723:Endoscopes; D006801:Humans; D010179:Pancreas / Q000000981:diagnostic imaging*; D010182:Pancreatic Diseases / Q000000981:diagnostic imaging