Hirano, Yasumitsu http://orcid.org/0000-0001-9087-2715
Hiranuma, Chikashi
Douden, Kenji
Hattori, Masakazu
Article History
Received: 27 December 2017
Accepted: 16 November 2018
First Online: 5 December 2018
Compliance with ethical guidelines
:
: Y. Hirano, C. Hiranuma, K. Douden, and M. Hattori declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1975 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.