Feldman, Mark2016-01-112016-01-111987-09-03https://hdl.handle.net/2152.5/2781Detailed formal protocol with illustrations and extensive bibliography.enGrand RoundsTeaching RoundsEsophageal AchalasiaEsophageal Motility DisordersEsophageal Spasm, DiffuseEsophagusOther35705