1. Mariinsky HospitalSt PetersburgRussia
2. European ClinicMoscowRussia
3. Clinical Regional Hospital after prof. OchapovskyKrasnodarRussia
4. Municipal Clinical Hospital n. 50MoscowRussia
5. Moscow University Hospital n. 31MoscowRussia
6. Regional Clinical Hospital n. 2KrasnodarRussia
7. Municipal Clinical Hospital n. 15n.n. O.M. FilatovMoscowRussia
8. Yaroslavl Regional Cancer HospitalYaroslavlRussia
9. Federal Medical Enterprise Polyclinic n. 2 of the Ministry of Economic DevelopmentMoscowRussia
10. Municipal Clinical Hospital n. 29NovokuznetskRussia
11. Samara Regional Cancer CenterSamaraRussia
12. Kemerovo Regional HospitalKemerovoRussia
13. State Scientific Centre of ColoprovtologyRussia
14. Consultative Diagnostic Center ‘Vivea’KhabarovskRussia
15. Medical Care Unit n. 41 of the Federal Biomedical AgencyGlazovUdmurtiaRussia
16. Hospital n. 13NizhnyNovgorodRussia
17. Humanitas InstituteItaly
18. Valduce HospitalComoItaly
19. Nuovo Regina Margherita HospitalRomeItaly
20. Humanitas Institute and Humanitas UniversityMilanItaly