3Newton GE,Parker JD.Acute effects of β1-selective and nonselective β-adrenergic receptor blockade and cardiac sympathetic activity in congestive heart failure[].Circulation.1996
4Poole-Wilson PA,Swedberg K,Cleland JG,et al.Comparison of carvedilol and metoprolol on clinical outcomes in patients with chronic heart failure in the Carvedilol Or Metoprolol European Trial (COMET): randomised controlled trial[].LancetThe.2003