1. Department of Pulmonary, Critical Care and Sleep Medicine, All India Institute of Medical Sciences, New Delhi, India;
2. Makerere Lung Institute, Makerere University, Kampala, Uganda;
3. Division of Pulmonary and Critical Care Medicine, Weill Cornell Medical College, New York, New York;
4. Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil;
5. Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital, Shanghai Medical College of Fudan University, Shanghai, China; and
6. University College London (UCL) Respiratory, UCL, London, United Kingdom