1. Section of Pulmonary, Critical Care and Sleep Medicine, Yale University School of Medicine, New Haven, Connecticut;
2. Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut;
3. Discipline of Physiotherapy, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia;
4. Allied Health, Sydney Local Health District, Sydney, Australia;
5. Sleep Medicine and Lung Health Consultants, Pittsburgh, Pennsylvania;
6. Respiratory Research@Alfred, Monash University, Melbourne, Australia;
7. Institute for Breathing and Sleep, Melbourne, Australia; and
8. Department of Physiotherapy and Department of Respiratory Medicine, Alfred Health, Melbourne, Australia