Kaneko, Shozo
Yamabe, Hiroshige
Hoshiyama, Tadashi
Kanazawa, Hisanori
Ito, Miwa
Kanemaru, Yusuke
Kiyama, Takuya
Tsujita, Kenichi
Article History
Received: 23 October 2018
Accepted: 21 December 2018
First Online: 3 January 2019
Compliance with ethical standards
:
: The authors declare that they have no competing interests.