P. A. Kochetkov
First Moscow State Medical University named after I.M. Sechenov (Sechenov University)
Russian Federation

Pyotr A. Kochetkov, Cand. of Sci. (Med.), Associate Professor, Head of the Department of ENT Diseases

8, Bldg. 2, Trubetskaya St., Moscow, 119991

V. A. Svistushkin
First Moscow State Medical University named after I.M. Sechenov (Sechenov University)
Russian Federation

Valeriy M. Svistushkin, Dr. of Sci. (Med.), professor, Head of the Department of ENT Diseases

8, Bldg. 2, Trubetskaya St., Moscow, 119991

E. S. Shchennikova
First Moscow State Medical University named after I.M. Sechenov (Sechenov University)
Russian Federation

Ekaterina S. Shchennikova, Otorhinolaryngologist, Department of Otorhinolaryngology, University Clinical Hospital No. 1

8, Bldg. 2, Trubetskaya St., Moscow, 119991