Matsubara, Shigeki http://orcid.org/0000-0003-4378-221X
Takahashi, Hironori
Takei, Yuji
Nakamura, Hiroyasu
Yagisawa, Takashi
Article History
Received: 8 October 2019
Accepted: 3 January 2020
First Online: 16 January 2020
Compliance with ethical standards
:
: The authors report no conflict of interest.
: Not needed.
: This article does not contain any studies involving human participants or animals.
: Not applicable.