RT Journal Article SR Electronic T1 Effects of β-blockers in patients undergoing noncardiac surgery JF Canadian Journal of Surgery JO CAN J SURG FD Canadian Medical Association SP 342 OP 344 VO 53 IS 5 A1 Tara M. Mastracci A1 Mary-Anne Aarts A1 Stephen D. Cassivi A1 Santiago A. Garcia A1 Richard F. McLean A1 Edward O. McFalls A1 , YR 2010 UL http://canjsurg.ca/content/53/5/342.abstract