The oesophagus and chest pain of uncertain cause.
D002637:Chest Pain / Q000209:etiology*; D015154:Esophageal Motility Disorders / Q000150:complications* / Q000175:diagnosis; D005764:Gastroesophageal Reflux / Q000150:complications / Q000175:diagnosis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008365:Manometry; D008991:Monitoring, Physiologic; D011379:Prognosis