Funding for this research was provided by:
Natural Science Foundation of Shandong Province (No. ZR2017MH055)
National Natural Science Foundation of China (No. 81900824)
the “Clinical Medicine + X” Engineering Research Project of Qingdao University Medical College
the Young Investigator Fund of Affiliated Hospital, Qingdao University
Article History
Received: 25 July 2020
Accepted: 8 January 2021
First Online: 4 February 2021
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.
: This study followed the tenets of the Declaration of Helsinki and was approved by the Ethics Committee, Affiliated Hospital of Qingdao University. All patients provided written consent to participate in the study.
: This study followed the tenets of the Declaration of Helsinki and was approved by the Ethics Committee, Affiliated Hospital of Qingdao University. All patients provided written consent to participate in the study.