Uchino, Akira http://orcid.org/0000-0002-4043-8168
Article History
Received: 19 January 2019
Accepted: 11 June 2019
First Online: 18 June 2019
Compliance with ethical standards
:
: The author declares no conflict of interest.
: This work was carried out in accordance with the ethical standards of the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.