Effect of β-blocker therapy on the level soluble ST2 protein in the blood serum in patients with heart failure with preserved and mildly reduced ejection fraction - E. V. Grakova; K. V. Kopeva; A. T. Teplyakov; M. V. Soldatenko; T. E. Suslova; V. V. Kalyuzhin (Бюллетень сибирской медицины, 2022)