Funding for this research was provided by:
Japan Society for the Promotion of Science (JSPS), KAKENHI (15K00745, 16H03722)
Received: 29 September 2018
Accepted: 27 March 2019
First Online: 11 April 2019
Ethics approval and consent to participate
: All procedures were conducted in accordance with the ethical standards of the Research Ethics Committee in Saitama Prefectural University (SPU-IBRA #26105) (first author’s employer) and the National Institute of Public Health (NIPH-IBRA#12123) (the third author’s employer). Informed consent was obtained from all individual participants included in the study.
: Consent to publish is obtained from all individual participants included in the study. All authors approved the final manuscript to be published.
: The authors declare that they have no competing interests. There is no concern that the grants could potentially influence or bias the insights in this series of studies.
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