Received: 22 May 2018
Accepted: 4 September 2019
First Online: 18 September 2019
Ethics approval and consent to participate
: All patients were fully informed of the disease, examinations, operative procedures, and complications, and were required to sign a written informed consent form before undergoing any procedures. All study protocols were approved by the Ethical Committee of the Aichi Prefectural Federation of Agricultural Cooperatives for Health and Welfare Kainan Hospital (approval no. 300214–01).
: Not applicable.
: The authors declare that they have no competing interests.