1. Kazan Medical University
2. V.I. Razumovsky Saratov State Medical University
3. Moscow Regional Research and Clinical Institute (MONIKI)
4. National Medical Research Centre for Coloproctology named after A.N. Ryzhikh
5. Research Institute of Rheumatology named after V.A. Nasonova
6. Research Institute of Rheumatology named after V.A. Nasonova;
Russian Medical Academy of Continuous Professional Education
7. Academician I.P. Pavlov First St. Petersburg State Medical University
8. City Clinical Hospital No. 31 (Saint Petersburg)