Yale School of Management, Stanford University, Stanford University, Innovations for Poverty Action Bangladesh, Innovations for Poverty Action, Innovations for Poverty Action, Yale University, Stanford University - Department of Epidemiology and Population Health, Yale University, Innovations for Poverty Action Bangladesh, Innovations for Poverty Action Bangladesh, Innovations for Poverty Action Bangladesh, Johns Hopkins University - Bloomberg School of Public Health, North South University, North South University - Global Health Institute, Stanford University - Division of Infectious Diseases and Geographic Medicine and Yale School of Management