About the Authors

Wen Gu

Affiliation Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China

Weiguo Xu

Affiliation Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China

Tao Ding

Affiliation Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China

Xuejun Guo

guoxj1964@yahoo.cn

Affiliation Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XG. Performed the experiments: WG WX. Analyzed the data: WG. Contributed reagents/materials/analysis tools: WG TD WX. Wrote the paper: WG XG.