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Seoul National University Bundang Hospital, Department of Internal Medicine, Seoul National University College of Medicine, Division of Pulmonary and Critical Care Medicine, Seongnam-si, Republic of Korea
Yonsei University College of Medicine, Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Seoul, South Korea
Seoul National University College of Medicine, Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine and Lung Institute, Seoul, South Korea
Hallym University Kangdong Sacred Heart Hospital, Division of Pulmonary, Allergy & Critical Care Medicine, Department of Internal Medicine, Chuncheon, South Korea