He, Miao
Li, Jie
Article History
Received: 17 November 2021
Accepted: 14 February 2022
First Online: 1 March 2022
Declarations
:
: This retrospective study involving human participants was conducted in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study was approved by the Committee of Central Hospital affiliated with Chongqing University. Informed consent was obtained from all participants or, if participants were under 16, from a parent and/or legal guardian.
: Not Applicable.
: The authors declare that they have no competing interests.