Takeyama, Yuji
Kato, Minoru
Nishihara, Chikako
Yamasaki, Takeshi
Iguchi, Taro
Tamada, Satoshi
Kuratsukuri, Katsuyuki
Nakatani, Tatsuya
Article History
Received: 5 March 2018
Accepted: 1 May 2018
First Online: 21 May 2018
Ethics
: Compliance with ethical standards
: All authors declared that they have no conflict of interest.