Shrestha, R
Tatsukawa, H
Shrestha, R
Ishibashi, N
Matsuura, T
Kagechika, H
Kose, S
Hitomi, K
Imamoto, N
Kojima, S
Article History
Received: 10 June 2015
Revised: 20 October 2015
Accepted: 21 October 2015
First Online: 3 December 2015
Competing interests
: The authors declare no conflict of interest. Although NI is an employee of Kowa Company Ltd., this did not affect the experimental design or interpretation of the results.