Received: 19 December 2020
Accepted: 9 October 2021
First Online: 18 October 2021
: This study obtained approval from the Ethics Committee of National Hospital Organization Kure Medical Center and the Chugoku Cancer Center Institutional Review Board Ethics Committee. Clinical registration number: No. 29–34.
: Written informed consent was obtained from the patients for publication.
: The authors declare that they have no competing interests.