T. G. Markova
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech; Russian Medical Academy for Continuous Professional Training; The Sverzhevskiy Otorhinolaryngology Healthcare Research Institute
Russian Federation

9, Bronitskaya st., Saint Petersburg, 190013, Russian Federation

2/1, Barrikadnaya st., Moscow, 125993, Russian Federation

9/10, Vernadskogo st., Moscow, 117152, Russian Federation

Yu. S. Korneva
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

9, Bronitskaya st., Saint Petersburg, 190013, Russian Federation

S. B. Sugarova
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

9, Bronitskaya st., Saint Petersburg, 190013, Russian Federation