Matsumoto, Takashi http://orcid.org/0000-0003-2653-5372
Kaifuchi, Noriko
Mizuhara, Yasuharu
Warabi, Eiji
Watanabe, Junko
Article History
Received: 26 February 2018
Accepted: 16 May 2018
First Online: 24 May 2018
Compliance with ethical standards
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: The authors of this manuscript have the following competing interests: TM, NK, YM, and JW are employees of Tsumura & Co. EW received a research grant from Tsumura & Co.