Exercise-based cardiac rehabilitation in patients with reduced left ventricular ejection fraction: The Cardiac Rehabilitation Outcome Study in Heart Failure (CROS-HF): A systematic review and meta-analysis. - Bjarnason-Wehrens B; Nebel R; Jensen K; Hackbusch M; Grilli M; Gielen S; Schwaab B; Rauch B (European journal of preventive cardiology, 2020)