[Gastroesophageal sphincter and acid reflux (author's transl)].
D004943:Esophagogastric Junction / Q000503:physiopathology*; D005750:Gastric Juice; D005764:Gastroesophageal Reflux / Q000503:physiopathology*; D006801:Humans; D006863:Hydrogen-Ion Concentration
Esfinter gastroesofágico y reflujo ácido.