1 Department of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea.
2 Chiwook Chung and Jung Eun Shin equally contributed to this work.
3 Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.
4 Department of Chest Medicine, Masan National Tuberculosis Hospital, Masan, Republic of Korea.
5 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.
6 Department of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea [email protected].