Vikram Patel1, Paul E Farmer2. 1. Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA 02115, USA; Harvard T H Chan School of Public Health, Boston, MA, USA; Sangath, Goa, India. Electronic address: vikram_patel@hms.harvard.edu. 2. Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA 02115, USA; Division of Global Health Equity, Brigham and Women's Hospital, Boston, MA, USA; Partners In Health, Boston, MA, USA.