Smajgl, A.
Toan, T. Q.
Nhan, D. K.
Ward, J.
Trung, N. H.
Tri, L. Q.
Tri, V. P. D.
Vu, P. T.
Article History
Received: 23 March 2014
Accepted: 17 November 2014
First Online: 12 January 2015
Competing interests
: The authors declare no competing financial interests.