Article History
Received: 14 January 2020
Revised: 17 June 2020
Accepted: 1 July 2020
First Online: 28 July 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was performed with the approval of the ethics committee of Linyi People’s Hospital and guided by the Declaration of Helsinki. All participants signed the informed consent documentations. Animal experiments were approved by the Institutional Animal Care and Use Committee of Linyi People’s Hospital. Efforts were made to avoid all unnecessary distress to the animals.