Article History
Received: 7 September 2017
Accepted: 3 January 2018
First Online: 19 January 2018
Competing Interests
: S.O. is a full professor at Kumamoto University and is also a director of Proteomedix Frontiers. T.K. is an employee of Otsuka Pharmaceutical Co., Ltd. This study was not supported by either of these companies, and their positions at the companies did not influence the design of the study, the collection of the data, the analysis or interpretation of the data, the decision to submit the manuscript for publication, or the writing of the manuscript and did not present any financial conflicts. The other authors declare no competing interests.