Funding for this research was provided by:
Lien Centre for Palliative Care (LCPC-IN16-0004, Salary support)
National Medical Research Council, Singapore (NMRC/HSRG/0057/2016)
Received: 26 November 2019
Accepted: 23 April 2020
First Online: 6 May 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Centralized Institutional Review Board of the Singapore Health Services #2016/2243) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.Informed consent was obtained from all individual participants included in the study.
: Not applicable.
: All authors declare that they have no potential conflict of interest.