V. V. Voronchikhin
Institute of Advanced Training of Physicians, Health Ministry of Chuvashia; Republican Clinical Hospital
Russian Federation

Voronchikhin Valentin Vladimirovich – Cand. of Med. Sci., Associate Professor, Head of the Department of Surgery, Institute of Advanced Training of Physicians, Head of the Surgical Department of Republican Clinical Hospital of Health Ministry of Chuvashia 

For correspondence: Voronchihin Valentin Vladimirovich – 33/124, boulevard Mittova, Cheboksary, 428000, Russian Federation. Phone: 8-937-396-25-18. E-mail: vorondoctor@yandex.ru

G. N. Krasnov
Republican Clinical Hospital; Ulyanov Chuvash State University
Russian Federation

Krasnov Gerasim Nikolaevich – Cand. of Med. Sci., Associate Professor at the Department of Surgical Diseases of Ulyanov Chuvash State University, Transfusiologist, Anesthesiologist, Surgeon at the Department of Anesthesiology and Intensive Care, Republican Clinical Hospital, Health Ministry of Chuvashia