Funding for this research was provided by:
JSPS KAKENHI (JP26461157.)
Text and Data Mining valid from 2019-03-18
Received: 19 January 2018
Accepted: 7 March 2019
First Online: 18 March 2019
Ethics approval and consent to participate
: This study complied with the principles of the Declaration of Helsinki and the current ethical guidelines and was approved by the Ethics Committee of Niigata University Medical and Dental Hospital (#2015–1898). Written informed consent was obtained from all participants at enrolment.
: Not applicable.
: The authors declare no competing financial interests.
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