Takao, Masaki http://orcid.org/0000-0002-5626-9477
Hamada, Hidetoshi
Sakai, Takashi
Sugano, Nobuhiko
Article History
Received: 8 May 2018
First Online: 29 October 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required.