1. Department of Bioethics, The Clinical Center, National Institutes of Health , Bethesda, Maryland , USA
2. Toronto Centre for Liver Disease, Toronto General Hospital, University of Toronto , Toronto, Ontario , Canada
3. Liver Diseases Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health , Bethesda, Maryland , USA
4. Department of Medicine, Western University , London, Ontario , Canada
5. Department of Epidemiology & Biostatistics, Western University , London, Ontario , Canada
6. Department of Philosophy, Western University , London, Ontario , Canada