title: Endoscopic piggyback pneumatic dilation in the initial management of patients with achalasia.
mesh_terms: D000328:Adult; D000368:Aged; D000388:Air; D004106:Dilatation / Q000295:instrumentation; D004931:Esophageal Achalasia / Q000628:therapy*; D020701:Esophagoscopes; D005260:Female; D006801:Humans