1. Universidade Federal de Sao Carlos, Brazil
2. I.M. Sechenov First Moscow State Medical University (Sechenov University), Russia
3. I.M. Sechenov First Moscow State Medical University, Russia
4. Russian National Centre of Surgery, Russia; I.M. Sechenov First Moscow State Medical University (Sechenov University), Russia
5. State Budgetary Institution of the Republic of Dagestan Polyclinic No 9, Russia