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Authors
Sukhneewat, Chonnakarn
Chaiyarit, Jitjira
Techasatian, Leelawadee https://orcid.org/0000-0003-4668-6792
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Funding
Funding for this research was provided by:
Khon Kaen University (IN58332)
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Article History
Received: 14 January 2019
Accepted: 22 May 2019
First Online: 2 July 2019
Ethics approval and consent to participate
: The study was approved by the institutional review board of the Khon Kaen University, Human Ethical Committee (#HE581286). Before participants were enrolled in the study, written informed consent was obtained from their parents or guardians.
: Not applicable.
: The authors declare that they have no competing interests.
