Intraesophageal acid perfusion test (Bernstein test).
D004942:Esophagitis, Peptic / Q000150:complications / Q000175:diagnosis*; D004947:Esophagus; D006801:Humans; D006851:Hydrochloric Acid; D007440:Intubation; D010146:Pain / Q000209:etiology
D006851:Hydrochloric Acid