1. Curtin University; School of Physiotherapy and Exercise Science, Faculty of Health Sciences; GPO Box U1987 Perth Western Australia Australia WA 6845
2. Sir Charles Gairdner Hospital; Institute for Respiratory Health; Perth Western Australia Australia
3. University of Toronto; Department of Physical Therapy; Toronto ON Canada
4. McGill University; School of Physical and Occupational Therapy; Montreal QC Canada
5. Research Institute of the McGill University Health Centre; Translational Research in Respiratory Diseases Program; Montreal Canada
6. Toronto General Research Institute, University Health Network; PMB 11-127, 585 University Avenue Toronto ON Canada M5G2N2
7. West Park Healthcare Centre; Respiratory Diagnostic & Evaluation Services; Toronto ON Canada
8. West Park Healthcare Centre, University of Toronto; Division of Respiratory Medicine; 82 Buttonwood Avenue Toronto ON Canada M6M 2J5