Funding for this research was provided by:
National Natural Science Foundation of China (NO. 81871013)
Beijing Medical Management Bureau Cultivation Plan (PX2018079)
Beijing Tiantan Hospital Young Scientist Program (YSP 201705)
Received: 18 August 2018
Accepted: 28 January 2019
First Online: 12 February 2019
Ethics approval and consent to participate
: All the procedures in this study were approved by the ethics committees of all hospitals, and written informed consent was obtained from all patients.
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: The authors declare that they have no competing interests.
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