Funding for this research was provided by:
The National Natural Science Foundation of China (81272981)
Beijing Natural Science Foundation (7151003)
Article History
Received: 21 March 2020
Accepted: 5 October 2020
First Online: 27 October 2020
Ethics approval and consent to participate
: The study followed the tenets of the Declaration of Helsinki and its ethical standards of 1964. The study was approved by the Medical Ethics Committee of the Beijing Tongren Hospital, and written informed consent was obtained from all participants.
: Not applicable.
: All authors declare that they have no potential conflict of interests.