Funding for this research was provided by:
National Natural Science Foundation of China (81871804)
Received: 2 December 2020
Accepted: 10 March 2021
First Online: 20 March 2021
: We got ethics approval from the affiliated hospital of Qingdao University. Informed consent obtained from all patients had been written. This was a retrospective study, so the trial registration was not required.
: We got consent for publication from all participants, all participants gave written consent for their personal or clinical details along with any identifying images to be published in this study.
: The authors declare that they have no conflicts of interest.