1. Department of Pulmonary and Critical Care Medicine, KyungHee University Medical Center, Seoul, Republic of Korea
2. Department of Pharmacology and
3. Department of Physiology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
4. Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea
5. Department of Pulmonary and Critical Care Medicine, KyungHee University Hospital at Gangdong, Seoul, Republic of Korea
6. Department of Immunology, Keimyung University School of Medicine, Daegu, Republic of Korea
7. Lung Research Institute of Hallym University, College of Medicine, Hallym University, Chuncheon, Republic of Korea
8. Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea
9. Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
10. Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea; and
11. Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea