About the Authors

Yong-Soo Kwon

Affiliation Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Korea

Yee Hyung Kim

Affiliation Department of Pulmonary and Critical Care Medicine, Kyung Hee University Hospital at Gangdong, School of Medicine, Kyung Hee University, Seoul, Korea

Kyeongman Jeon

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

Byeong-Ho Jeong

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

Yon Ju Ryu

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Medicine, Ewha Medical Center and Ewha Medical Research Institute, Ewha Womans University School of Medicine, Mokdong Hospital, Seoul, Korea

Jae Chol Choi

Affiliation Department of Internal Medicine, Chung-Ang University School of Medicine, Seoul, Korea

Ho Cheol Kim

Affiliation Department of Internal Medicine, College of Medicine, Gyeongsang Institute of Health Sciences, Gyeongsang National University, Jinju, Korea

Won-Jung Koh

wjkoh@skku.edu

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YSK WJK. Performed the experiments: YSK YHK KJ BHJ YJR JCC HCK WJK. Analyzed the data: YSK YHK KJ BHJ YJR JCC HCK WJK. Contributed reagents/materials/analysis tools: YSK YHK KJ BHJ YJR JCC HCK WJK. Wrote the paper: YSK WJK.