Matsumoto, Kenji
Ehara, Shoichi
Nakamura, Yasuhiro
Otsuka, Keiko
Kawase, Yoshio
Article History
Received: 15 December 2017
Accepted: 20 April 2018
First Online: 23 April 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this study were conducted with the patients’ informed consent, and complied with the national ethical guidelines for medical and health research involving human subjects and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.