Funding for this research was provided by:
National Natural Science Foundation of China (31601081)
the Key Project Specialized for Infectious Diseases of the Chinese Ministry of Health (2013ZX10003009)
Tongzhou District Science and Technology Committee (KJ2017CX053)
Text and Data Mining valid from 2018-08-29
Received: 13 November 2017
Accepted: 14 August 2018
First Online: 29 August 2018
Ethics approval and consent to participate
: The ethical committee of Beijing Chest Hospital approved this study. The study methodologies conformed to the standards set by the Declaration of Helsinki and the experiments were undertaken with the understanding and written consent of each patient. All the authors ensured that all risks were minimized and the subjects were not injured.
: Not applicable.
: All authors declare that they have no competing interests.
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