For citations:
Lazebnik L.B., Golovanova E.V., Volel B.A., Korochanskaya N.V., Lyalyukova E.A., Mokshina M.V., Mekhtiev S.N., Mekhtieva O.A., Metsaeva Z.V., Petelin D.S., Simanenkov V.I., Sitkin S.I., Cheremushkin S.V., Chernogorova M.V., Khavkin А.I. Functional gastrointestinal disorders. Overlap syndrome Clinical guidelines of the Russian Scientific Medical Society of Internal Medicine and Gastroenterological Scientific Society of Russia. Experimental and Clinical Gastroenterology. 2021;(8):5-117. (In Russ.) https://doi.org/10.31146/1682-8658-ecg-192-8-5-117