Obara, Yusuke
Machida, Takuji
Takano, Yuho
Shiga, Saki
Suzuki, Asami
Hamaue, Naoya
Iizuka, Kenji
Hirafuji, Masahiko
Article History
Received: 17 October 2017
Accepted: 4 April 2018
First Online: 15 May 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.