Achalasia in Northern Nigeria.
D000293:Adolescent; D000328:Adult; D002299:Cardia / Q000601:surgery*; D002648:Child; D004931:Esophageal Achalasia / Q000601:surgery*; D004945:Esophagoscopy; D004947:Esophagus / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D009549:Nigeria