Nguyen Cong, Khanh http://orcid.org/0000-0002-2034-9483
Nguyen Thi My, Linh
Article History
First Online: 14 June 2019
Compliance with Ethical Standards
:
: Authors declare that they have no conflict of interest.
: All procedures performed in the study involving human participants were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000.
: Informed consent was obtained from all participants included in the study.