Formulas for calculating the depth of insertion for the upper and lower esophageal sphincters.
Wilson
Melissa
M
Bishop
Phyllis
P
Nowicki
Michael
M
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