Weiskopf, Richard B Perioperative use of beta-adrenergic antagonists and anemia: known knowns, known unknowns, unknown unknowns; and Unknown Knowns. [electronic resource] - Anesthesiology Jan 2010 - 12-5 p. digital Publication Type: Comment; Editorial ISSN: 1528-1175 Standard No.: 10.1097/ALN.0b013e3181c5dc18 doi Subjects--Topical Terms: Adrenergic beta-Antagonists--adverse effectsAnemia--etiologyBisoprolol--therapeutic useHeart Rate--drug effectsHospital MortalityHumansPostoperative Complications--drug therapyRandomized Controlled Trials as TopicRetrospective StudiesStroke Volume--drug effects