title: A comparison of clinical measurements of gastroesophageal reflux.
mesh_terms: D000328:Adult; D000368:Aged; D001464:Barium; D002933:Cineradiography; D003937:Diagnosis, Differential; D005260:Female; D005745:Gastric Acidity Determination; D005764:Gastroesophageal Reflux / Q000175:diagnosis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008722:Methods; D008875:Middle Aged; D010477:Perfusion
chemical_list: D001464:Barium