patients were evaluated for a history of pyrosis and regurgitation and underwent otolaryngologic examination , barium esophagram , upper endoscopy , esophageal biopsy , standard esophageal manometrics , acid reflux testing , and bernstein examination , as well as tests of esophageal dysmotility and acid clearance time before and after bethanechol ( 50 micrograms/kg , two doses ) .
C0017168
acid reflux
C0014858
esophageal dysmotility