The presence of duodeno-gastral reflux testifies to the duodenostasis and incompetence of closing function of the pyloric sphincter.
T. G. Chaus, A. I. Rudenko, M. O. Reva 2009, 'Secretory activity of gastroduodenal zone before and after cholecystectomia', Vìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Bìologìâ, Ekologìâhttp://ecology.dp.ua/index.php/ECO/article/view/179. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)