Received: 22 July 2020
Accepted: 14 October 2020
First Online: 22 October 2020
Ethics approval and consent to participate
: The research protocol was approved by the Shiga University of Medical Science Research Ethics Committee (reference number: R2019-165). Written informed consent for using the tissue samples was obtained from the 97 patients.
: We have obtained consent for publication from the patients.
: The authors declare that they have no competing interests.