Funding for this research was provided by:
Japan Society for the Promotion of Science (jp23370105)
Received: 9 June 2019
Accepted: 30 March 2020
First Online: 10 April 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Nagasaki University Graduate School of Biomedical Sciences. All participants provided written informed consent before examinations. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.