Hiyoshi, Masahide http://orcid.org/0000-0002-2392-7787
Yano, Koichi
Nanashima, Atsushi
Imamura, Naoya
Hamada, Takeomi
Wada, Takashi
Article History
Received: 30 May 2019
Accepted: 10 September 2019
First Online: 5 December 2019
Compliance with ethical standards
:
: MH, KY, AN, NI, TH, and TW declare that they have no conflict of interest.
: The study was performed conforming to the Helsinki declaration of 1975, as revised in 2000 and 2008 concerning human and animal rights, and the authors followed the policy concerning informed consent as shown on Springer.com. The study design was approved by the Ethics Review Board of our institution, and consent to participate in the study was obtained by an opt-out procedure.
: The authors are solely responsible for the data and the contents of the paper. In no way, the Honorary Editor-in-Chief, Editorial Board Members, or thr printer/publishers are responsible for the results/findings and content of this article.