1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Massachusetts
2. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
3. Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
4. Department of Child Health, The University of Missouri School of Medicine, Columbia, Missouri
5. Department of Medicine, University of Hong Kong, Hong Kong
6. Department of Pathology, Wonju College of Medicine, Yonsei University, Wonju, South Korea
7. Department of Respiratory Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
8. Division of Pulmonary and Critical Care Medicine, Department of Medicine, John Hopkins School of Medicine, Baltimore, Maryland
9. Department of Physical Therapeutics, Kyoto University Hospital of Medicine, Kyoto, Japan
10. University of Occupational and Environmental Health, Kitakyushu, Japan
11. Department of Pulmonary Medicine, Zhongshan Hospital, Shanghai, China
12. Fudan University, Shanghai, China
13. Division of Allergy, Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts
14. Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, South Korea
15. The Prince Charles Hospital, Metro North Hospital and Health Service, Brisbane, Australia; and
16. The University of Queensland Thoracic Research Centre at The Prince Charles Hospital, Brisbane, Australia