Funding for this research was provided by:
Beijing Municipal Science & Technology Commission (No. Z161100000116051)
Text and Data Mining valid from 2019-04-06
Received: 21 December 2018
Accepted: 24 March 2019
First Online: 6 April 2019
Ethics approval and consent to participate
: The local ethical committee approval was obtained from Fuwai HospitalApproval (NO:2016–836). Written informed consents were obtained from all participants before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.
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