Funding for this research was provided by:
Japan Society for the Promotion of Science (JP15K09345)
Japan Agency for Medical Research and Development
Received: 27 August 2017
Accepted: 23 November 2017
First Online: 4 December 2017
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of Kawasaki Medical School (approval number: 1422-3). All subjects provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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