Effect of beta-blocker on left ventricular function and natriuretic peptides in patients with chronic heart failure treated with angiotensin-converting enzyme inhibitor. - Hara,Y.; Hamada,M.; Shigematsu,Y.; Suzuki,M.; Kodama,K.; Kuwahara,T.; Hashida,H.; Ikeda,S.; Ohtsuka,T.; Hiasa,G.; Hiwada,K. (JPN Circ J, 2000)