Funding for this research was provided by:
Prince of Songkla University (57294081)
Article History
Received: 17 October 2017
Accepted: 5 September 2018
First Online: 2 November 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Ethics Committee of the Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand, Chairperson Assoc. Prof. Boonsin Tangtrakulwanich, EC number 57294081 on October 8, 2014 and amendment approval EC number 57294081 on February 6, 2017. The consent to participate was not applicable.
: Not applicable.
: The authors declare that they have no competing interests.
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