Funding for this research was provided by:
Japan Society for the Promotion of Science (16H05389)
Received: 24 September 2019
Accepted: 17 February 2020
First Online: 27 February 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethical Review Board for Clinical Studies at Osaka University (control number 17259). Written informed consent was waived. All the patients have the right to opt out of being included in research studies, way of to do so is written in the webpage of our Department.
: This study has no information by which an individual could be identified. Then, written consent for publication was waived.
: The authors declare no conflicts of interest in association with the present study.