Acknowledgments
The authors are indebted to all members of the Respiratory Diseases Laboratory of Chengdu Second People’s Hospital. All authors contributed substantially to the study design, data analysis and interpretation, and the writing of the manuscript. Conceived and designed the experiments: Mingjin Yang, Depeng Jiang. Performed the experiments: Yan Zhang. Analyzed the data: Mingjin Yang, Zhibo Xu, Depeng Jiang. Contributed reagents/materials/analysis tools: Yuejun Du. Wrote thefirst draft of the manuscript: Zhang Yan, Mingjin Yang.