The therapeutic effect of anti-dysbiotic drug "Qertulidon” on the condition of oral tissues in rats after antihelicobacter pylori therapy - A. P. Levitskij; O. A. Makarenko; I. A. Selivanskaja; V. S. Ivanov; A. V. Nikolaeva; T. V. Tomilina (Actual problems of transport medicine: environment, occupational health, pathology, 2015)