Kumamoto, Tsutomu
Kurahashi, Yasunori
Niwa, Hirotaka
Nakanishi, Yasutaka
Ozawa, Rie
Okumura, Koichi
Ishida, Yoshinori
Shinohara, Hisashi http://orcid.org/0000-0001-8931-1902
Article History
Received: 4 October 2018
First Online: 12 August 2019
Conflict of interest
: The authors declare that they have no conflicts of interest.
: This study complied with all ethical standards.