1. Department of Medicine, Respiratory Investigation Unit, Queen's University and Kingston General Hospital, Kingston, ON, Canada
2. Department of Chest Diseases, Faculty of Medicine, Alexandria University, Alexandria, Egypt
3. Faculty of Physical Education for Men, Alexandria University, Alexandria, Egypt
4. School of Health Sport and Bioscience, University of East London, United Kingdom
5. Department of Physical Therapy and UBC Centre for Heart Lung Innovation, University of British Columbia and St. Paul's Hospital, Vancouver, BC, Canada
6. Department of Kinesiology & Physical Education, McGill University, Montreal, QC, Canada
7. College of Nursing and Professional Disciplines, University of North Dakota, Grand Forks, North Dakota, United States