1. Higher School of Theoretical Mechanics, Peter the Great St. Petersburg Polytechnic University, 195251 Saint Petersburg, Russia
2. Naval Surgery Chair, S. M. Kirov Military Medical Academy, 194044 Saint Petersburg, Russia
3. Coloproctology Department, Saint-Petersburg I. I. Dzhanelidze Research Institute of Emergency Medicine, 192242 Saint Petersburg, Russia
4. N.N. Petrov National Medical Research Center of Oncology, 197758 Saint Petersburg, Russia
5. Flinders Street Campus, Torrens University, Melbourne, VIC 3000, Australia