Received: 28 July 2020
Accepted: 16 February 2021
First Online: 23 February 2021
Ethics approval and consent to participate
: The study was approved by the institutional review board of the “Office of The Committee for Research Ethics (Social Sciences), Mahidol University (No.: 2017/055.1403)”, and all participants gave written informed consent prior to the study.
: Not applicable.
: The authors declare that they have no competing interests.