Received: 6 February 2021
Accepted: 6 June 2021
First Online: 23 July 2021
: This study was approved by Khon Kaen University Ethics Committee for Human Research (HE551268). All participants provided written informed consent before enrolment. All methods were performed in accordance with the relevant guidelines and regulations (Declaration of Helsinki).
: Not applicable.
: The authors declare that they have no competing interests.