1. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
2. Department of Environmental Medicine and New York University Cancer Institute, New York University School of Medicine, New York, New York, USA
3. Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, USA
4. Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, USA
5. The Earth Institute, Columbia University, New York, New York, USA
6. Department of Economics, School of International and Public Affairs, Columbia University, New York, New York, USA
7. National Institute of Preventive and Social Medicine, Dhaka, Bangladesh
8. Columbia University Arsenic Research Project, Dhaka, Bangladesh
9. Departments of Health Studies, Medicine, and Human Genetics, University of Chicago Cancer Research Center, Chicago, Illinois, USA