Funding for this research was provided by:
National Natural Science Foundation of China (81570895, 81970849)
Natural Science Foundation of Beijing Municipality (7182034)
program for National Key R&D Program of China (2016YFC20160905200)
Text and Data Mining valid from 2020-02-11
Received: 18 October 2019
Accepted: 28 January 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Beijing TongRen Hospital and all subjects provided written informed consent prior to entry in the study.
: Not applicable.
: The authors declare that they have no competing interests.