Funding for this research was provided by:
Japan Society for the Promotion of Science (JP19H00617, JP19K14174, JP16K16622)
Ministry of Education, Culture, Sports, Science and Technology (JP16H01637)
Takeda Science Foundation (NaN)
Japan Science and Technology Corporation/Research Institute of Science and Technology for Society (NaN)
Text and Data Mining valid from 2019-08-27
Received: 29 April 2019
Accepted: 13 August 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of the University of Fukui, and was conducted in accordance with the Declaration of Helsinki and the Ethical Guidelines for Clinical Studies published by the Ministry of Health, Labour, and Welfare of Japan. All participants signed an informed consent form.
: Not applicable.
: The authors declare that they have no competing interests.