Takashima, Shigeo
Toyoshi, Kayoko
Yamamoto, Takuhei
Shimozawa, Nobuyuki
Funding for this research was provided by:
Koshiyama Foundation for Promotion of Science and Technology
Takahashi Industrial and Economic Research Foundation
Article History
Received: 8 April 2020
Accepted: 17 July 2020
First Online: 31 July 2020
Competing interests
: The authors declare no competing interests.