Funding for this research was provided by:
Peking University Third Hospital (Y62419-06)
Science and Technology fund of Winter Olympics (2018YFF0301100)
Received: 12 November 2020
Accepted: 24 March 2021
First Online: 2 April 2021
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethical Committee of Peking University Third Hospital and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.