Funding for this research was provided by:
Japan Society for the Promotion of Science (Kakenhi 15K10063, Kakenhi 19K09055, Kakenhi 19K05954)
Kurozumi Medical Foundation
Received: 26 February 2020
Accepted: 3 May 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: We obtained written informed consent from all patients and approval for this study from the Ethics Committee of Kuma Hospital (local Institutional Review Board Number: 20130808-1).
: Not applicable.
: The authors declare that they have no competing interests.