title: Tests for gastrooesophageal reflux.
mesh_terms: D002648:Child; D002675:Child, Preschool; D004942:Esophagitis, Peptic / Q000175:diagnosis*; D005745:Gastric Acidity Determination / Q000379:methods*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007223:Infant