About the Authors
- S. V Subramanian, Malavika Subramanyam
- Harvard School of Public Health, Boston, Massachusetts, United States of America
- George Davey Smith
- University of Bristol, Bristol, United Kingdom
The authors have declared that no competing interests exist.
SVS conceived the study and analyzed and interpreted the data. GDS contributed to the analysis and interpretation of the results. MS assisted with literature review and data analysis. SVS wrote and edited the manuscript. GDS contributed to the editing of the manuscript.