1 Paul H Nitze School of Advanced International Studies, Johns Hopkins University, Baltimore, MD 20036, USA.
2 Paul H Nitze School of Advanced International Studies, Johns Hopkins University, Baltimore, MD 20036, USA; Berman Institute of Bioethics, Johns Hopkins University, Baltimore, MD 20036, USA; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 20036, USA. Electronic address: jfanzo1@jhu.edu.
3 Global Alliance for Improved Nutrition, Geneva, Switzerland.
4 Food and Agriculture Organization of the United Nations, Rome, Italy.