title: Letter regarding article by O'Neill et al, "Peak oxygen consumption as a predictor of death in patients with heart failure receiving beta-blockers".
authors.forename: Robert L
authors.initials: RL
authors.lastname: Bard
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use*; D006333:Heart Failure / Q000188:drug therapy / Q000401:mortality*; D006801:Humans; D010101:Oxygen Consumption; D011237:Predictive Value of Tests
chemical_list: D000319:Adrenergic beta-Antagonists