For citations:
Larina V.N., Bondarenkova A.A., Lunev V.I., Golovko M.G. Extra-esophageal symptoms of gastroesophageal reflux disease, as manifestations of polymorbidity. Experimental and Clinical Gastroenterology. 2019;(6):4-8. (In Russ.) https://doi.org/10.31146/1682-8658-ecg-166-6-4-8