Funding for this research was provided by:
National Research Council of Thailand
Chiang Mai University Mid-Career Research Fellowship Program
Received: 3 May 2018
Accepted: 11 January 2019
First Online: 21 January 2019
Ethics approval and consent to participate
: This study was reviewed and approved by the Ethics Research Committee from Faculty of Associated Medical Sciences, Chiang Mai University.
: Not applicable.
: The authors declare that they have no competing interests.
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