Text and Data Mining valid from 2019-09-10
Received: 6 June 2019
Accepted: 28 August 2019
First Online: 10 September 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committees of the Royal Thai Army Medical Department. Each subject signed an informed consent form prior to their research participation.
: Not applicable.
: The authors declare that they have no competing interests.