About the Authors
Public Health Foundation of India, New Delhi, India
Office of World Health Organization Representative to India, New Delhi, India
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MK SSA VV. Performed the experiments: VV SSA. Analyzed the data: VV SSA. Contributed reagents/materials/analysis tools: MK SK RSC. Wrote the paper: SSA VV MK.