Authors: Darcy D Marciniuk; Donna Goodridge; Paul Hernandez; Graeme Rocker; Meyer Balter; Pat Bailey; Gord Ford; Jean Bourbeau; Denis E O'Donnell; Francois Maltais; Richard A Mularski; Andrew J Cave; Irvin Mayers; Vicki Kennedy; Thomas K Oliver; Candice Brown Journal: Can Respir J Date: 2011 Mar-Apr Impact factor: 2.409