About the Authors

Rachel M. Amiya

Affiliations Department of Health Policy, National Center for Child Health and Development, Tokyo, Japan, Department of Family Nursing, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Linda B. Mlunde

Affiliation Department of Community and Global Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Erika Ota

e-i@umin.ac.jp

Affiliation Department of Health Policy, National Center for Child Health and Development, Tokyo, Japan

Toshiyuki Swa

Affiliation Graduate School of Human Sciences, Osaka University, Suita, Japan

Olufemi T. Oladapo

Contributed equally to this work with: Olufemi T. Oladapo, Rintaro Mori

Affiliation UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland

Rintaro Mori

Contributed equally to this work with: Olufemi T. Oladapo, Rintaro Mori

Affiliation Department of Health Policy, National Center for Child Health and Development, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EO RM OTO. Performed the experiments: RMA LBM. Analyzed the data: RMA LBM EO OTO RM. Contributed reagents/materials/analysis tools: RM OTO. Wrote the paper: RMA LBM EO TS OTO RM. Developed and conducted search strategy for each database: TS.