About the Authors

Kenneth Hill
Harvard Center for Population and Development Studies, Harvard School of Public Health, Cambridge, Massachusetts, United States of America

Danzhen You
United Nations Children's Fund, New York, New York, United States of America

Mie Inoue, Mikkel Z. Oestergaard
Department of Health Statistics and Information Systems, World Health Organization, Geneva, Switzerland

Corresponding Author


Competing Interests

The authors have declared that no competing interests exist. The views expressed in this paper are those of the authors and do not necessarily reflect the views of the UN IGME agencies and the funding sources.

Author Contributions

Conceived and designed the research: KH DY MI MZO. Analyzed the data: KH DY MI MZO. Contributed reagents/materials/analysis tools: KH DY MI MZO. Wrote the first draft of the manuscript: KH DY MZO. Contributed to the writing of the manuscript: KH DY MI MZO. ICMJE criteria for authorship read and met: KH DY MI MZO. Agree with manuscript results and conclusions: KH DY MI MZO.