Ishikawa, Yuko
Niwano, Takao
Hirano, Shinichi
Numano, Kayoko
Takasima, Kazunori
Imokawa, Genji http://orcid.org/0000-0001-7312-4475
Article History
Received: 12 December 2018
Revised: 8 January 2019
Accepted: 9 February 2019
First Online: 18 February 2019
Compliance with ethical standards
:
: 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 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors state no conflict of interest.