title: The incidence and importance of cricopharyngeal achalasia in elderly patients with obstructive airways disease.
authors.affiliation: West Los Angeles Veterans Administration Medical Center, Wadsworth Division, California 90073.
authors.forename: A
authors.initials: A
authors.lastname: Williams
authors.forename: M
authors.initials: M
authors.lastname: Stein
mesh_terms: D000368:Aged; D004931:Esophageal Achalasia / Q000453:epidemiology / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D015994:Incidence; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011877:Radionuclide Imaging