Yamaguchi, Koichi
Yamaguchi, Aya
Itai, Miki
Kashiwagi, Chiharu
Takehara, Kazutaka
Aoki, Shuhei
Sawada, Yuri
Taguchi, Kohei
Umetsu, Kazue
Oshima, Kazuma
Uchida, Megumi
Takemura, Masao
Hara, Kenichiro
Motegi, Sei-ichiro
Muro, Yoshinao
Nakasatomi, Masao
Sakairi, Toru
Hiromura, Keiju
Kurabayashi, Masahiko
Maeno, Toshitaka
Article History
Received: 4 June 2019
Revised: 7 July 2019
Accepted: 30 July 2019
First Online: 16 August 2019
Compliance with ethical standards
: This study was approved by institutional review board of Gunma University. This study was conducted by the principles of the Declaration ofHelsinki.
: The authors declare that they have no conflict of interest.