1. Roger V.L. "Epidemiology of heart failure". Circ Res . 2021;128:10: 1421-1434. https://doi.org/10.1161/CIRCRESAHA.121.318172. 2. Glynn P.A., Molsberry R., Harrington K., et al. "Geographic variation in trends and disparities in heart failure mortality in the United States, 1999 to 2017". J Am Heart Assoc . 2021;10:9: e020541 https://doi.org/10.1161/JAHA.120.020541. 3. Greene S.J., Butler J., Albert N.M., et al. "Medical therapy for heart failure with reduced ejection fraction". J Am Coll Cardiol .