Funding for this research was provided by:
National Research Council of Thailand (NRCT) and Mahidol University
Received: 5 November 2020
Accepted: 22 January 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: The study was approved by Mahidol University’s IPSR-IRB, certificate of approval no. 2016/12-150 and 2020/05-241. Written informed consent was obtained from all participants. No minors (persons under the age of 16) participated in the study.
: Not applicable.
: The authors declare that they have no competing interests.