1 The University of Sydney, Sydney Health Ethics, Level 1, Medical Foundation Building, K25, Sydney, NSW, 2006, Australia. miriam.wiersma@sydney.edu.au.
2 The University of Sydney, Sydney Health Ethics, Level 1, Medical Foundation Building, K25, Sydney, NSW, 2006, Australia.
3 Centre for Ethics in Medicine and Society, Alfred Hospital, Monash University, Commercial Road, Prahran, Victoria, Australia.
4 Haematology Department, Royal North Shore Hospital, Reserve Rd, St Leonards, NSW, 2065, Australia.