Funding for this research was provided by:
Japan Society for the Promotion of Science (17K10559, 19K18067, 26461957)
Received: 16 February 2020
Accepted: 16 March 2020
First Online: 5 April 2020
Ethics approval and consent to participate
: Written informed consent was obtained from all subjects. This research conformed to the provisions of the Declaration of Helsinki in 2013. All patients were informed of the investigational nature of this study and provided their written, informed consent. The study protocol was approved by the Ethics Committee of Osaka City University (#926).
: Not applicable.
: The authors declare that they have no competing interests.