Funding for this research was provided by:
National Natural Science Foundation of China (81500006)
Open Project of State Key Laboratory of Respiratory Disease (SKLRD2016OP013)
Text and Data Mining valid from 2018-05-09
Received: 5 February 2018
Accepted: 26 April 2018
First Online: 9 May 2018
Ethics approval and consent to participate
: This study was approved by the institutional review boards of the First Affiliated Hospital of Zhengzhou University and all participants provided written informed consent.
: The authors have reported to Respir Res that no potential conflicts of interest exist with any companies/organizations whose products or services may be discussed in this article.
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