to determine if bile acids reflux into the esophagus in patients with gastroesophageal reflux disease and in normal subjects during physiological gastroesophageal reflux episodes , esophageal aspiration and ph monitoring were performed simultaneously in 16 patients with gastroesophageal reflux disease and 8 normal subjects .
C0014876
esophagus
C0017168
gastroesophageal reflux disease