Funding for this research was provided by:
Institute of Mental Health Bridging Fund (545-2016)
National Medical Research Council (NMRC/CG/004/2013)
Received: 19 November 2020
Accepted: 20 April 2021
First Online: 30 April 2021
: The study was approved by the National Healthcare Group Domain Specific Review Board in Singapore (reference number: 2016/00921). Written informed consent was obtained from all participants. All methods in the current study were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.