1. Altay State Medical University, Barnaul; Research Institute of Complex Cardiovascular Problems, Siberian Branch, Russian Academy of Medical Sciences, Kemerovo
2. Altay State Medical University, Barnaul
3. Research Institute of Complex Cardiovascular Problems, Siberian Branch, Russian Academy of Medical Sciences, Kemerovo; Altay Region Cardiology Dispanser, Barnaul
4. Altay Region Cardiology Dispanser, Barnaul