Chen, Xiang-Bai
Hien, Nguyen Thi Minh
Han, Kiok
Nam, Ji-Yeon
Huyen, Nguyen Thi
Shin, Seong-Il
Wang, Xueyun
Cheong, S. W.
Lee, D.
Noh, T. W.
Sung, N. H.
Cho, B. K.
Yang, In-Sang
Article History
Received: 2 February 2015
Accepted: 9 July 2015
First Online: 24 August 2015
Competing interests
: The authors declare no competing financial interests.