title: Letter: Lower oesophageal sphincter.
mesh_terms: D005764:Gastroesophageal Reflux / Q000150:complications / Q000601:surgery*; D006548:Hernia, Diaphragmatic / Q000150:complications / Q000601:surgery; D006801:Humans; D008722:Methods; D009130:Muscle, Smooth / Q000601:surgery