1. Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen’s University and Kingston General Hospital, Kingston, Ontario, Canada
2. Division of Respiratory Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
3. Laboratory of Respiratory Pathophysiology, Respiratory Division, Department of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
4. Department of Chest Diseases, Faculty of Medicine, Alexandria University, Alexandria, Egypt
5. Respiratory Division, Pulmonary Function and Clinical Exercise Physiology, Federal University of Sao Paulo, Sao Paulo, Brazil; and
6. Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy