Funding for this research was provided by:
Received: 17 September 2020
Accepted: 11 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the amended Declaration of Helsinki. The protocol was approved by clinical research ethnics committees at Tokushima University Hospital (approval number 2593) and Tokushima Prefectural Central Hospital (approval number 1739). Written informed consent was obtained from patients or their authorized surrogate decision-makers.
: Not applicable.
: The authors declare that they have no competing interests.