Funding for this research was provided by:
Thailand Research Fund
Received: 22 November 2019
Accepted: 1 September 2020
First Online: 10 September 2020
Ethics approval and consent to participate
: The study has complied with relevant national regulations and policies and has followed the tenets of the Declaration of Helsinki which approved by the Mahidol University-Central Institutional Review Board (MU-CIRB COA no. 2016/173.3012). All participants have informed for the details and signed on the informed consent before participating in the study.
: Not applicable.
: The authors declare that they have no competing interests.