Funding for this research was provided by:
Japan Agency for Medical Research and Development (JP18lk0310049, JP17lk0310036, JP19lk0310064)
Text and Data Mining valid from 2019-10-11
Received: 19 June 2019
Accepted: 1 October 2019
First Online: 11 October 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: All registered participants provided written informed consent, and the study design was approved by the appropriate institutional review boards at Keio University, Chiba University, Kanazawa University, and Kameda Medical Center.