V. I. Popadyuk
Peoples’ Friendship University of Russia named after Patrice Lumumba
Russian Federation

Valentin I. Popadyuk - Dr. Sci. (Med.), Professor, Head of the Department of Otorhinolaryngology, Peoples’ Friendship University of Russia named after Patrice Lumumba.

6, Miklukho-Maklai St., Moscow, 117198

M. A. Lengina
South Ural State Medical University
Russian Federation

Maria A. Lengina - Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology, South Ural State Medical University.

64, Vorovskiy St., Chelyabinsk, 454092

A. M. Korkmazov
South Ural State Medical University
Russian Federation

Arsen M. Korkmazov - Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology, South Ural State Medical University.

64, Vorovskiy St., Chelyabinsk, 454092

K. S. Zyryanova
South Ural State Medical University
Russian Federation

Kira S. Zyryanova - Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology, South Ural State Medical University.

64, Vorovskiy St., Chelyabinsk, 454092

N. V. Kornova
South Ural State Medical University
Russian Federation

Natalya V. Kornova - Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology, South Ural State Medical University.

64, Vorovskiy St., Chelyabinsk, 454092