About the Authors

Chuling Fang

Affiliation Department of Respiratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China

Hui Huang

Affiliation Department of Respiratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China

Zuojun Xu

xuzj@hotmail.com

Affiliation Department of Respiratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CLF ZJX. Performed the experiments: CLF HH. Analyzed the data: CLF. Contributed reagents/materials/analysis tools: CLF. Wrote the paper: CLF ZJX.