Nguyen, C T
Pham, N M
Do, V V
Binns, C W
Hoang, V M
Dang, D A
Lee, A H
Article History
Received: 10 November 2016
Revised: 11 April 2017
Accepted: 13 April 2017
First Online: 10 May 2017
Competing interests
: The authors declare no conflict of interest.