1. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
2. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Korea.
3. Research Agency for Clinical Practice Guidelines, Korean Academy of Medical Sciences Research Center, Seoul, Korea.
4. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
5. Department of Pulmonary and Critical Care Medicine, Inje University Ilsan Paik Hospital, Goyang, Korea.
6. Department of Pulmonary and Critical Care Medicine, Kyung Hee University Medical Center, Seoul, Korea.
7. Department of Internal Medicine, Gyeongsang National University Changwon Hospital, Gyeongsang National University School of Medicine, Changwon, Korea.
8. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.
9. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
10. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
11. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
12. Department of Anesthesiology and Pain Medicine, Chonnam National University Medical School, Gwangju, Korea.
13. Department of Pediatrics, Dongguk University Ilsan Hospital, Goyang, Korea.
14. Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul, Korea.
15. Department of Internal Medicine, Keimyung University Dongsan Hospital, Daegu, Korea.