Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology
Text and Data Mining valid from 2018-05-03
Received: 28 June 2017
Accepted: 25 April 2018
First Online: 3 May 2018
Ethics approval and consent to participate
: The Research Ethics Committee of the Graduate School of Medicine, The University of Tokyo in Japan approved the study protocol (Protocol No. 10724-(1)), and informed consent was waived according to the Japanese Ethical Guidelines for Medical and Health Research.
: ZM, BKY, JT, ST, and YK declare that they have no competing interests. FN works at Bayel Yakuhin Ltd. from 1 January 2018. FN declares that he has no competing interests in relation to the submitted paper because he participated in this study exclusively when he worked at The University of Tokyo and National Cerebral and Cardiovascular Center by 31 December 2017.
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