1. Research Institute of Nephrology; Pavlov University
2. M.F. Vladimirsky Moscow Regional Research Clinical Institute
3. Internal Medicine Department №2, Rostov State Medical University
4. Sechenov First Moscow State Medical University (Sechenov University)
5. Polyclinic with a Clinical Diagnostic Center, Pavlov University
6. Novgorod Regional Clinical Hospital
7. Clinic of the Research Institute of Nephrology, Pavlov University
8. Pskov Regional Clinical Hospital
9. Murmansk Regional Clinical Hospital named after P.A. Bayandina
10. Hemodialysis Center Bodrost
11. Leningrad Regional Clinical Hospital