Funding for this research was provided by:
Text and Data Mining valid from 2018-08-02
Received: 11 March 2018
Accepted: 29 July 2018
First Online: 2 August 2018
Ethics approval and consent to participate
: The study protocol was ethically reviewed and approved by the institution review board at Juntendo University (15–057), Tokyo, Japan and carried out in accordance with the principles outlined in the 2002 Declaration of Helsinki of the World Medical Association. This study was registered at the University Hospital Medical Information Network Clinical Trials Registry as UMIN000020372.
: Not applicable.
: Y.K., T.F., and T.K. are employees of Kirin Co., Ltd. The authors declare that they have no competing interests.
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