Funding for this research was provided by:
Kansai Medical University
Received: 1 March 2020
Accepted: 16 June 2020
First Online: 30 June 2020
Ethics approval and consent to participate
: This study was approved by the National Ethics Committee for Health Research, Ministry of Health, Lao PDR (reference no. 072-2017/NECHR), as well as by the institutional review board of Kansai Medical University (reference no. 0108).
: Not applicable.
: The authors confirm that there are no known conflicts of interest associated with this publication, and this work received no significant financial support that could have influenced its outcomes.