NEW POSSIBILITIES FOR EVALUATION OF SEVERITY AND PROGNOSIS IN PATIENTS WITH CHRONIC HEART FAILURE BASED ON N-TERMINAL PRO-BRAIN NATRIURETIC PEPTIDE PLASMA LEVEL - A. S. Galjavich; S. N. Merjasev; R. A. Galjavi; R. F. Merjaseva (Рациональная фармакотерапия в кардиологии, 2016)