Achalasia of the oesophagus in Nigeria.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004931:Esophageal Achalasia / Q000175:diagnosis / Q000453:epidemiology* / Q000601:surgery; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009549:Nigeria