Funding for this research was provided by:
Faculty of Medicine, Chiang Mai University
Received: 27 February 2021
Accepted: 19 July 2021
First Online: 29 July 2021
: This study was approved by the Research Ethics Committee of Faculty of Medicine, Chiang Mai University (Approval number: 449/2017).
: Not applicable.
: The authors declare that they have no competing interests.