1. Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
2. Department of Medicine, National University Hospital, Singapore
3. National Taiwan University College of Medicine, Taipei, Taiwan
4. Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
5. Division of Thoracic Surgery, Toronto General Hospital, University Health Network, University of Toronto, Toronto, ON, Canada