Article History
Received: 7 October 2019
Revised: 23 October 2019
Accepted: 28 October 2019
First Online: 14 November 2019
Compliance with ethical standards
:
: Yukio Abe, Yosuke Takahashi, and Toshihiko Shibata declare that they have no conflicts of interest.
: All procedures were conducted in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later revisions.