STUDY OF HEART RATE AND CORTICOSTERONE VARIABILITY IN THE SIMULATION OF RHINO-SURGICAL INTERVENTIONS IN BIOLOGICAL OBJECTS Article Popadyuk Valentin, Kostyaeva Margarita, Kastyro Igor, Shmaevsky Pavel, Khamidulin George, Dragunova Svetlana, Severina Evgenia, Yunusov Teymur, Kleyman Veronika, Kuznetsov Nikita, Kazakova Olga, Tychinskaya Daria, Kostyuk Polina, Tsigura Daria, Ezhova Daria, Ezhova Ekaterina Otorhinolaryngology, Head and Neck Pathology. International Society for Clinical Physiology and Pathology. Vol. 2. 2023. P. 4-9