the causal correlation between gastrooesophageal reflux and respiratory symptoms was established on the ground of 24-hour monitoring of oesophageal ph , radioisotopic examination of the stomach and oesophagus , evaluation of the bronchial reactivity to the acidification of the oesophagus and of the allergic tests .
C0017168
gastrooesophageal reflux
C0014876
oesophagus