Achalasia of the esophagus in a small urban community.
D000328:Adult; D000367:Age Factors; D000368:Aged; D004931:Esophageal Achalasia / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008910:Minnesota; D012737:Sex Factors