1 Division of Bioethics, Department of Biomedical Education and Anatomy, College of Medicine, The Ohio State University, Graves Hall 2190, 333 West 10th Avenue, Columbus, OH, 43210, USA. matthew.vest@osumc.edu.
2 McDonald Centre for Theology, Ethics, and Public Life, Christ Church, St Aldates, Oxford, OX1 1DP, UK.
3 Faculty of Theology and Religion, University of Oxford, Radcliffe Observatory Quarter, Oxford, OX2 6GG, UK.