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Article History

Received: 23 January 2020

Accepted: 22 October 2020

First Online: 3 November 2020

Ethics approval and consent to participate

: All patients were fully informed of the disease, examinations and complications, and were required to sign a written informed consent form before undergoing any procedures. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. No administrative permission was required to access and use the medical records described in this study. All study protocols were approved by Ethical Committee of the Gamagori City Hospital (approval no. Gamabyo 500-4). The requirement for research consent was waived due to the study’s retrospective nature.

: Not applicable.

: The authors declare that they have no competing interests.