1. Division of Supportive and Palliative Care, National Cancer Centre Singapore, Singapore, Singapore.
2. Lien Centre for Palliative Care, Duke-NUS Medical School, Singapore, Singapore.
3. Department of Cardiology, National Heart Centre Singapore, Singapore, Singapore.
4. Nursing Specialty Care Unit, National Heart Centre Singapore, Singapore, Singapore.
5. Wolfson Palliative Care Research Centre, Hull York Medical School, University of Hull, Hull, United Kingdom.
6. Program in Health Services & Systems Research and Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore, Singapore.
7. Centre for Child, Adolescent and Maternal Health Research, Tampere University, Tampere, Finland.