Funding for this research was provided by:
Major project of Chongqing Municipal Health Commission (#2016ZDXM006)
Science Commission of Yuzhong District, Chongqing, China (#2017-18)
Received: 29 November 2018
Accepted: 13 May 2019
First Online: 29 May 2019
Ethics approval and consent to participate
: Use of archived human lung tissue was approved by the Ethics Committees of the First Affiliated Hospital of Chongqing Medical University.
: We have obtained consent to publish from the participant.
: The authors declare that they have no competing interests.
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