Funding for this research was provided by:
JSPS KAKENHI (JP 16K19190)
Text and Data Mining valid from 2019-10-16
Received: 7 August 2019
Accepted: 5 October 2019
First Online: 16 October 2019
Compliance with ethical standards
: The authors declare no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional Review Board of Gunma University Hospital (Approval #160007) and with the 1964 Declaration of Helsinki.
: Informed consent was obtained from all individual participants included in the study.