Mikami, Koji http://orcid.org/0000-0003-3811-0072
Li, Chengze http://orcid.org/0000-0002-2646-0684
Irie, Ryunosuke http://orcid.org/0000-0002-5469-9473
Hama, Yoichiro http://orcid.org/0000-0002-9016-4644
Article History
Received: 24 September 2018
Accepted: 16 July 2019
First Online: 7 August 2019
Competing interests
: The authors declare no competing interests.