Received: 18 May 2021
Revised: 14 June 2021
Accepted: 28 June 2021
First Online: 6 July 2021
: This study was approved by the institutional clinical research ethics committee of Federation of National Public Service Personnel Mutual Aid Associations, Hamanomachi Hospital (No.2019-21). Informed consent for the procedure was obtained by surgeon from each patient.
: This study took opting out to obtain consents for publication and participation.
: The authors declare that they have no competing interests.