Funding for this research was provided by:
Japan Society for the Promotion of Science (15K07243, 17H03740)
Received: 24 January 2018
Accepted: 26 April 2018
First Online: 3 May 2018
Ethics approval and consent to participate
: All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institution research committee and with the 1964 Helsinki Declaration and its later amendments for comparable ethical standards. The Ethics Committee for Human Use of Nagasaki University obtained ethical approval. This study was approved by the Ethics Committee of Nagasaki University Graduate School of Biomedical Sciences (project registration number 14051404). Written consent forms were available in Japanese to ensure a comprehensive understanding of the study objectives, and informed consent was provided by the participants.
: The authors declare that they have no competing interests.
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