A. O. Khikhlova
Chelyabinsk Regional Clinical Hospital; South Ural State Medical University
Russian Federation

Alina O. Khikhlova — Cand. Sci. (Med.), Endoscopist; Teaching Assistant of the Department of Hospital Surgery

454048, Chelyabinsk, Vorovskogo str., 70, build. 5

G. M. Khusainova
Chelyabinsk Regional Clinical Hospital; South Ural State Medical University
Russian Federation

Guzel M. Khusainova — Cand. Sci. (Med.), Rheumatologist; Associate Professor, Department of Hospital Therapy

454092, Chelyabinsk, Vorovskogo str., 70. build. 5

A. A. Saenko
South Ural State Medical University
Russian Federation

Anna A. Saenko — Cand. Sci. (Med.), Associate Professor, Department of Hospital Therapy

454141, Chelyabinsk, Vorovskogo str., 70, build. 5

E. R. Olevskya
Chelyabinsk Regional Clinical Hospital; South Ural State Medical University
Russian Federation

Elena R. Olevskya — Dr. Sci. (Med.), Head of the Department of Endoscopy; Professor of the Department of Hospital Surgery

454080, Chelyabinsk, Vorovskogo str., 70, build. 5

A. I. Dolgushina
South Ural State Medical University
Russian Federation

Anastasia I. Dolgushina — Dr. Sci. (Med.), Head of the De- partment of Hospital Therapy

454048, Chelyabinsk, Vorovskogo str., 70. build. 5

Yu. S. Belousov
Chelyabinsk Regional Clinical Hospital

Stanislav Yu. Belousov — Physician at the Department of Cli- nical Pathomorphology

454080, Chelyabinsk, Vorovskogo str., 70, build. 5