Wang, Qian
Wei, Wen Bin
Wang, Ya Xing
Yan, Yan Ni
Yang, Jing Yan
Zhou, Wen Jia
Chan, Szy Yann
Xu, Liang
Jonas, Jost B.
Article History
Received: 28 January 2019
Accepted: 27 December 2019
First Online: 12 February 2020
Ethics approval and consent to participate
: This study was conducted according to the tenets of the Declaration of Helsinki. The Medical Ethics Committee of the Beijing Tongren Hospital approved the study protocol. Written informed consent was obtained from every participant after a full explanation of the nature and possible consequences of the study.
: Not applicable.
: The authors declare that they have no competing interests.