Text and Data Mining valid from 2019-04-06
Received: 28 May 2018
Accepted: 28 March 2019
First Online: 6 April 2019
Ethics approval and consent to participate
: This study was reviewed and approved by the Institutional Review Board of Royal Thai Army Medical Department (S058 h/60_Exp).
: Not applicable.
: The authors declare that they have no competing interests.
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