title: Video of the Month--Position-Dependent Transit of a Bolus in Long-Standing Achalasia.
authors.affiliation: University of South Florida Morsani College of Medicine, Tampa, Florida, USA.
authors.forename: Kirbylee K
authors.initials: KK
authors.lastname: Nelson
authors.affiliation: University of South Florida Morsani College of Medicine, Tampa, Florida, USA.
authors.forename: Steven B
authors.initials: SB
authors.lastname: Clayton
authors.affiliation: University of South Florida Morsani College of Medicine, Tampa, Florida, USA.
authors.forename: Joel E
authors.initials: JE
authors.lastname: Richter
mesh_terms: D001466:Barium Sulfate; D003287:Contrast Media; D004931:Esophageal Achalasia / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate