title: Overlap phenomenon: a potential pitfall in the radiographic detection of lower esophageal rings.
authors.affiliation: Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce St., Philadelphia, PA 19104, USA.
authors.forename: Wendy C
authors.initials: WC
authors.lastname: Hsu
authors.forename: Marc S
authors.initials: MS
authors.lastname: Levine
authors.forename: Stephen E
authors.initials: SE
authors.lastname: Rubesin
mesh_terms: D000368:Aged; D001466:Barium Sulfate; D003251:Constriction, Pathologic; D003287:Contrast Media; D004947:Esophagus / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D011859:Radiography
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate