The incidence and importance of cricopharyngeal achalasia in elderly patients with obstructive airways disease.
Williams
A
A
West Los Angeles Veterans Administration Medical Center, Wadsworth Division, California 90073.
Stein
M
M
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