Effects of posture in hiatus hernia as studied by oesophageal pH measurement.
D005764:Gastroesophageal Reflux / Q000517:prevention & control*; D006356:Heartburn / Q000209:etiology; D006548:Hernia, Diaphragmatic / Q000150:complications*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011187:Posture; D013997:Time Factors