RT Journal Article SR Electronic T1 Safety of long-acting β2-agonists in the management of asthma JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 119 OP 120 VO 56 IS 2 A1 Anthony D. D’Urzo A1 Pieter Jugovic A1 Jacques Bouchard A1 Reuven Jhirad A1 Itamar Tamari YR 2010 UL http://www.cfp.ca/content/56/2/119.abstract AB