Decision rule for stratification of patients with chronic heart failure of functional class II and III - E. V. Samoilova; M. A. Fatova; D. R. Mindzaev; I. V. Zhitareva; C. N. Nasonova; I. V. Zhirov; C. N. Tereschenko; A. A. Korotaeva (Бюллетень сибирской медицины, 2020)