Xuan Huynh, Nguyen Thi http://orcid.org/0000-0002-8393-978X
Chihaia, Viorel http://orcid.org/0000-0002-3910-9105
Son, Do Ngoc http://orcid.org/0000-0001-9414-9727
Article History
Received: 13 August 2018
Accepted: 12 November 2018
First Online: 20 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.