1 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
2 University of British Columbia Centre for Heart Lung Innovation, St. Paul's Hospital, Vancouver, BC, Canada.
3 Division of Respiratory Medicine, University of British Columbia, Vancouver, BC, Canada.
4 Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia.
5 Department of Pulmonology and Respiratory Medicine, Faculty of Medicine, Universitas Indonesia-Persahabatan National Respiratory Center Hospital, Jakarta, Indonesia.
6 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
7 Department of Respiratory Medicine and Infectious Disease, Graduate School of Medicine, Yamaguchi University, Ube, Japan.