Kohga, A.
Kawabe, A.
Okumura, T.
Yamashita, K.
Isogaki, J.
Suzuki, K.
Article History
Received: 16 September 2017
Accepted: 25 January 2018
First Online: 1 February 2018
Compliance with ethical standards
:
: All authors declare that they have no conflicts 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.
: This article does not contain any studies with animals performed by any of the authors.
: For this type of study formal consent is not required.