Yamada, Takayuki
Kanemaki, Yoshihide
Okamoto, Satoko
Nakajima, Yasuo
Article History
Received: 12 January 2018
Accepted: 21 March 2018
First Online: 26 March 2018
Compliance with ethical standards
:
: Takayuki Yamada: There is no conflict of interest to disclose with respect to the study. Yoshihide Kanemaki: There is no conflict of interest to disclose with respect to the study. Satoko Okamoto: There is no conflict of interest to disclose with respect to the study. Yasuo Nakajima: There is no conflict of interest to disclose with respect to the study.
: This study was approved by our institutional review board.