1 Department of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Department of Politics and International Studies, University of Cambridge, Cambridge, UK. Electronic address: vgupta7@partners.org.
2 Division of Global Health Equity, Brigham and Women's Hospital, Boston, MA 02115, USA; Earth Institute, Columbia University, New York, NY, USA.
3 Royal Institute of International Affairs, Chatham House, London, UK.