1. Department of Social Science, Health & Medicine, King’s College London, Strand, London WC2R 2LS, UK
2. Department of Primary Care and Public Health Sciences, King’s College London, Weston Street, London SE1 3QD, UK
3. Department of Philosophy, University College London, London WC1E 6BT, UK
4. Department of Political Science, University College London, London WC1H 9QU, UK