Yanagi, Itaru
Akahori, Rena
Takeda, Ken-ichi
Article History
Received: 13 June 2019
Accepted: 28 August 2019
First Online: 11 September 2019
Competing Interests
: Financial support for this study was provided by Hitachi, Ltd. I.Y., R.A. and K.T. are current employees of Hitachi, Ltd. The authors declare no non-financial conflict of interests.