title: Retroversion examination of the duodenal bulb.
authors.forename: E
authors.initials: E
authors.lastname: Burkhalter
mesh_terms: D004386:Duodenum / Q000473:pathology*; D020699:Gastroscopes; D006801:Humans; D011708:Pylorus / Q000473:pathology*; D014741:Video Recording / Q000295:instrumentation*