Funding for this research was provided by:
Faculty of Medicine, Chiang Mai University (017/2562)
Received: 20 December 2019
Accepted: 16 October 2020
First Online: 30 October 2020
Ethics approval and consent to participate
: The protocol for this study was approved by the Research Ethics Committee 4, Faculty of Medicine, Chiang Mai University (No. 158/2018). This study complied with the principles set forth in the Declaration of Helsinki (1964) and all of its subsequent amendments. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.