Funding for this research was provided by:
National Natural Science Foundation of China (81561128015)
National Key R&D Program of China (2017YFC0909600)
Received: 29 August 2018
Accepted: 6 February 2019
First Online: 14 February 2019
Ethics approval and consent to participate
: The study was conducted with the approval of the Ethics Committee of Beijing Tongren Hospital, Capital Medical University. (TRECKY2018–033) The study was not required for informed consent statement with the approval of the Beijing Tongren Hospital, Capital Medical University Institutional Review Board.
: Not applicable.
: The authors declare that they have no competing interests.
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