A. Kozlovska
North-Western State Medical University named after I. I. Mechnikov
Russian Federation

Anastasia Kozlovska, post-graduate student of the Department of Hospital Surgery named after V. A. Oppel 

St. Petersburg

E.  E. Topuzov
North-Western State Medical University named after I. I. Mechnikov; City Clinical Oncological Dispensary
Russian Federation

Eldar E. Topuzov, MD, PhD, DSc, Prof, Head of the Department of Hospital Surgery named after V. A. Oppel, North-Western State Medical University named after I. I. Mechnikov, Physician‑in‑ Chief City Clinical Oncological Dispensary

St. Petersburg

S.  V. Rachinsky
North-Western State Medical University named after I. I. Mechnikov
Russian Federation

Stanislav V. Rachinsky, Associate Professor of the Department of Hospital Surgery named after V. A. Oppel

St. Petersburg