TY JOUR TI Early Physical Rehabilitation in Frail Patients Undergoing Coronary Artery Bypass Surgery KW coronary artery bypass grafting KW rehabilitation KW physical training KW initial asthenia syndrome JO Bulletin of Rehabilitation Medicine AU Argunova., Y.A. AU Pomeshkina., S.A. AU Barbarash., O.L. PY 2022 IS 21 PB Federal State Budgetary Institution «National Medical Research Center of Rehabilitation and Balneology» of Ministry of Healthcare of Russian Federation