1. The Ethox Centre and Wellcome Centre for Ethics and Humanities, Nuffield Department of Population Health, University of Oxford. Old Road Campus, Oxford OX3 7LF, UK
2. Monash Bioethics Centre, Monash University, Wellington Rd, Clayton, 3800, Victoria, Australia
3. Department of Medicine, Royal Melbourne Hospital, University of Melbourne, 300 Grattan St, Parkville, 3050, Victoria, Australia