Aya, Satoshi http://orcid.org/0000-0001-5873-1701
Araoka, Fumito http://orcid.org/0000-0002-9387-6081
Article History
Received: 20 December 2019
Accepted: 26 May 2020
First Online: 26 June 2020
Competing interests
: The authors declare no competing interests.