Funding for this research was provided by:
MEXT | Japan Society for the Promotion of Science (17H04273, 17KK0195, 17K19702)
Received: 28 October 2019
Revised: 18 February 2020
Accepted: 3 March 2020
First Online: 25 March 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Kumamoto University (Permission number: 1365). Written informed consent was obtained from each patient. Our study was performed in accordance with the Declaration of Helsinki.
: The datasets used and/or analysed during this study are available from the corresponding author on reasonable request.
: The authors declare no competing interests.
: JSPS KAKENHI, grant number 17H04273, 17K19702 and 17KK0195 (to Y.B.).