Article History
Received: 1 December 2019
Accepted: 3 March 2020
First Online: 13 July 2020
Ethics approval and consent to participate
: The present study was approved by the Ethics Committee of Liaocheng People’s Hospital. The research has been carried out in accordance with the World Medical Association Declaration of Helsinki. All patients provided written informed consent prior to their inclusion within the study.
: Not applicable.
: The authors declare that they have no competing interests.