1. Heart and Vessels Center of Tumen Regional Clinical Hospital №1; Tumen State Medical University
2. Ural State Medical University
3. Sverdlovsk Regional Clinical Hospital №1
4. Chelyabinsk Regional Cardiology Hospital
5. Heart and Vessels Center of Tumen Regional Clinical Hospital №1
6. Tumen Regional Clinical Hospital №1
7. Regional Cardiology Clinic “The Center of Cardiovascular Surgery and diagnosis”