title: Lower esophageal sphincter or upper gastric sphincter?
authors.affiliation: Department of Medicine, Graduate Hospital, Philadelphia, PA, USA.
authors.forename: D O
authors.initials: DO
authors.lastname: Castell
authors.forename: P O
authors.initials: PO
authors.lastname: Katz
mesh_terms: D000818:Animals; D004943:Esophagogastric Junction / Q000503:physiopathology* / Q000601:surgery; D018662:Fundoplication; D005764:Gastroesophageal Reflux / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D019736:Prostheses and Implants; D016896:Treatment Outcome