Tsukamoto, Masanori
Hitosugi, Takashi
Yokoyama, Takeshi
Article History
Received: 27 December 2018
Accepted: 28 June 2019
First Online: 4 July 2019
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 and/or national 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.