Yamanaka, Motoyoshi
Sano, Shin-ichi
Al Zaabi, Hamad Bu Alrougha
Fujioka, Hiroshi
Iryu, Yasufumi
Article History
Received: 13 February 2020
Accepted: 6 August 2020
First Online: 14 September 2020
Competing interests
: The authors declare that they have no competing interests.