| Affiliation: | 1. Department of Internal Medicine, Yong‐in Severance Hospital, Yonsei University College of Medicine, Yong‐in, Republic of Korea;2. Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea;3. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, SMG‐SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea;4. Pulmonary Division, Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea;5. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, Republic of Korea;6. Pulmonary Division, Department of Internal Medicine, Yeouido St Mary's Hospital, Seoul, Republic of Korea;7. Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Republic of Korea;8. Division of Pulmonary Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University Medical School, Anyang, Republic of Korea |
