Is hiatus hernia responsible for reflux?
D004947:Esophagus / Q000473:pathology; D005764:Gastroesophageal Reflux / Q000209:etiology* / Q000473:pathology; D006548:Hernia, Diaphragmatic / Q000150:complications*; D006551:Hernia, Hiatal / Q000150:complications*; D006801:Humans