Funding for this research was provided by:
Oppenheimer Memorial Trust
H.B and M.J. Thom Awards
National Research Foundation (TTK20100726000013413)
Ministry of Education, Science, Sports and Culture of Japan (21580216, 15K07540)
Article History
Received: 15 July 2016
Revised: 16 May 2017
Accepted: 7 June 2017
First Online: 7 July 2017