1. Institute for Global Health, University College London, Gower Street, London, WC1E 6BT, England.
2. Ramalingaswami Centre on Equity & Social Determinants of Health, Public Health Foundation of India, Bangalore, India.
3. Petrie-Flom Center for Health Law Policy and Bioethics at Harvard Law School, Harvard TH Chan School of Public Health, Cambridge, United States of America.