Funding for this research was provided by:
Medicine and Health Science Technology Development Plan Project of Shandong Province (2019WS042)
Article History
Received: 10 November 2021
Accepted: 16 May 2022
First Online: 21 May 2022
Declarations
:
: This study was approved by the medical ethics committee of the Shengli Oilfield Central Hospital (approved No. of ethic committee: Q/ZXYY--ZY--YWB--LL201923). The study is designed in accordance with the principles of the Declaration of Helsinki. All subjects will provide written informed consent before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.