Received: 3 October 2021
Accepted: 8 January 2022
First Online: 28 January 2022
: The Institutional Review Boards at Duke Kunshan University in China (protocol# 2020WLO0002) and the University of Ruhuna in Sri Lanka (proposal# 2020/P/036) approved this study.
: We certify that all methods were conducted within relevant guidelines, all participants signed a written informed consent form before participating, and all responses were anonymous. No explicit consent for publication is required because no personally identifying information is presented.
: The authors declare they have no competing interests.