1. St. Petersburg City Alexander Hospital
2. Research Institute – Regional Clinical Hospital No. 1 n.a. prof. S.V. Ochapovsky; Kuban State Medical University
3. City Multidisciplinary Hospital No. 2
4. A.I. CM. Kirov Military Medical Academy
5. I.I. Mechnikov North-Western State Medical University
6. St. Petersburg State University
7. Amur State Medical Academy, Clinic of Cardiac Surgery