Igarashi, Yutaka http://orcid.org/0000-0003-0012-4225
Nogami, Yoshie
Article History
First Online: 1 November 2019
Compliance with Ethical Standards
:
: No sources of funding were used to assist in the preparation of this article.
: Yutaka Igarashi and Yoshie Nogami have no conflicts of interest relevant to the content of this article.