1 Faculty of Philosophy, Oxford Uehiro Centre for Practical Ethics, University of Oxford, Oxford, UK; Department of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, Australia.
2 Faculty of Philosophy, Oxford Uehiro Centre for Practical Ethics, University of Oxford, Oxford, UK.
3 Faculty of Philosophy, Oxford Uehiro Centre for Practical Ethics, University of Oxford, Oxford, UK. Electronic address: thomas.douglas@philosophy.ox.ac.uk.