Funding for this research was provided by:
Natural Science Foundation of Shandong Province (ZR2016HL39)
Received: 16 February 2020
Accepted: 18 May 2021
First Online: 29 June 2021
: The study was approved by the Ethics Committee of Yantai Yuhuangding Hospital on November 27, 2017 (registration number: YLYLLS  008). Written informed consent was obtained from all participants.
: The consent for publication is not applicable because this study does not include any individual details, images, or videos.
: The authors have no conflicts of interest to declare.