1 Harvard Medical School and Harvard T H Chan School of Public Health, Boston, MA 02115, USA; Sangath, Goa, India. Electronic address: vikram_patel@hms.harvard.edu.
2 The Lakshmi Mittal and Family South Asia Institute, Harvard University, Cambridge, MA, USA.
3 Biocon & Biocon Biologic, Bengaluru, India.
4 Center for Public Policy, IIM Bangalore, Bengaluru, India.
5 Harvard Business School and The Lakshmi Mittal and Family South Asia Institute, Harvard University, Cambridge, MA, USA.
6 Wellcome Trust Research Laboratory, Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India.