Funding for this research was provided by:
Strategic Scholarships of Frontier Research Network (Specific for the Southern region), the Office of the Higher Education Commission (022/2012)
National Research Council of Thailand (year 2014)
the Graduate School of Prince of Songkla University (year 2012)
Article History
Received: 25 January 2019
Accepted: 28 May 2019
First Online: 1 June 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants of this study.