TY - JOUR T1 - Are the recommendations to use perioperative β-blocker therapy in patients undergoing noncardiac surgery based on reliable evidence? JF - Canadian Medical Association Journal JO - CMAJ SP - 245 LP - 247 DO - 10.1503/cmaj.1031619 VL - 171 IS - 3 AU - P.J. Devereaux AU - Salim Yusuf AU - Homer Yang AU - Peter T.-L. Choi AU - Gordon H. Guyatt Y1 - 2004/08/03 UR - http://www.cmaj.ca/content/171/3/245.abstract N2 - ER -