About the Authors

Zi Chen

Affiliation Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, P. R. China

Hong-bing Liu

Affiliation Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, P. R. China

Chun-hua Yu

Affiliation Department of medical Engineering, Jinling Hospital, The Second Military Medical University, Nanjing, P. R. China

Ying Wang

Affiliation Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical Collage, Wuhu, P. R. China

Li Wang

Affiliation Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, P. R. China

Yong Song

yong_song6310@yahoo.com

Affiliation Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZC YS. Performed the experiments: ZC HL CY. Analyzed the data: ZC HL. Contributed reagents/materials/analysis tools: CY YW LW. Wrote the paper: ZC HL.