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Article History

Received: 8 August 2017

Accepted: 5 July 2018

First Online: 22 August 2018

Ethics approval and consent to participate

: The initial survey was approved by the National Regulatory Authority of Lao PDR and collected with informed consent. The data were collected for public use and made available to the research team for the purpose of this study with the approval of the NRA. All data used by the study team were de-identified. For these reasons, additional ethical approval was not sought.

: Not applicable.

: The authors declare that they have no competing interests.

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