A. A. Tret'yakov
Orenburg State Medical University,Health Ministry of Russia
Russian Federation

Tret'yakov Anatoly Andreyevich – Doct. of Med. Sci., Professor, Head of the Chair of Surgery

I. I. Khizhnyak
Orenburg State Medical University,Health Ministry of Russia
Russian Federation

Khizhnyak Irina Igorevna – Assistant of the Chair of Surgery 

For correspondence: Khizhnyak Irina Igorevna – 30, 8, str. Turkestanskaya, Orenburg, 460000, Russian Federation.

A. A. Stadnikov
Orenburg State Medical University,Health Ministry of Russia
Russian Federation

Stadnikov Alexander Abramovich – Doct. of Biol. Sci., Professor, Head of the Chair of Histology, Cytology, Embryology

A. N. Neverov
Orenburg State Medical University,Health Ministry of Russia
Russian Federation

Neverov Alexey Nikolaevich – Cand. of Med. Sci., Associate Professor of the Chair of Surgery