RT Journal Article SR Electronic T1 Réfutation: Faut-il éviter les β-agonistes dans les cas de bronchopneumopathies chroniques obstructives modérées et graves? JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 1432 OP 1432 VO 53 IS 9 A1 Aaron, Shawn D. YR 2007 UL http://www.cfp.ca/content/53/9/1432.2.abstract AB