Manzano, L [What further data are required to extend the use of beta blockers in cardiac failure?]. [electronic resource] - Revista clinica espanola Apr 2005 - 147-8 p. digital Publication Type: Comment; Editorial ISSN: 0014-2565 Standard No.: 10.1157/13074159 doi Subjects--Topical Terms: Adrenergic beta-Antagonists--economicsCost-Benefit AnalysisHeart Failure--drug therapyHumans