title: Formulas for calculating the depth of insertion for the upper and lower esophageal sphincters.
authors.forename: Melissa
authors.initials: M
authors.lastname: Wilson
authors.forename: Phyllis
authors.initials: P
authors.lastname: Bishop
authors.forename: Michael
authors.initials: M
authors.lastname: Nowicki
mesh_terms: D002648:Child; D019160:Endosonography; D049630:Esophageal Sphincter, Lower / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D004945:Esophagoscopy / Q000379:methods; D006801:Humans; D008432:Mathematical Computing; D012044:Regression Analysis