Funding for this research was provided by:
Chinese Natural Scientific Grant (81460022, 81760396)
Qinghai Natural Scientific Grant (2016-ZJ-747)
Hunan Provincial Innovation Fund (S2017SFYLJS0070)
Received: 28 October 2020
Accepted: 6 January 2021
First Online: 12 February 2021
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were approved by the Qinghai Provincial People’s Hospital, and in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no competing interests.