Funding for this research was provided by:
Natural Science Foundation of Zhejiang Province (LY20H180003)
Natural Science Foundation of Ningbo (2019A610104)
Ningbo Municipal Bureau of Science and Technology (202002N3104)
Received: 18 February 2021
Accepted: 25 May 2021
First Online: 5 June 2021
: This retrospective study was approved by the Ethics Committee of the Affiliated Hospital of Medical School of Ningbo University, and identity information of all patients had been de-identified to protect patient privacy.
: All authors provided their consent to publish.
: The authors declare that they have no competing interests.