Received: 8 February 2021
Accepted: 2 December 2021
First Online: 16 December 2021
: Ethics approval for this study was obtained from the ethical committee of the National Healthcare Group Domain Specific Review Board, Singapore (Reference Number: 2015/00269). The study and was conducted in accordance with the Declaration of Helsinki. Written informed consent was obtained from all participants of the study after being informed about the study purpose, procedure and confidentiality of the data collected.
: Not applicable.
: The authors declare that they have no competing interests. The authors confirm that all authors have approved the manuscript for submission and the content of the manuscript has not been published or submitted for publication elsewhere.