Takaji, Ryo
Yamada, Yasunari
Matsumoto, Shunro
Kiyonaga, Maki
Hongo, Norio
Mori, Hiromu
Hijiya, Naoki
Ohta, Masayuki
Inomata, Masafumi
Takaki, Hajime
Fukuzawa, Kengo
Yonemasu, Hirotoshi
Article History
First Online: 23 May 2018
Compliance with ethical standards
:
: No funding was received for this study.
: The authors declare that they have no conflict of interest.
: All procedures performed in this study 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. IRB approval was obtained, and informed consent was waved for this retrospective study.