RT Journal Article SR Electronic T1 Should patients with severe heart failure be treated with beta-blockers? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 469 OP 470 VO 68 IS 5 A1 Hobbs, Robert E. YR 2001 UL http://www.ccjm.org/content/68/5/469.abstract AB