1. Department of Health Policy; National Center for Child Health and Development; Tokyo Japan
2. Department of Maternal and Child Health; National Center for Child Health and Development; Tokyo Japan
3. Department of Paediatrics; Graduate School of Medicine; University of Tokyo; Tokyo Japan
4. Faculty of Public Health; Khon Kaen University; Khon Kaen Thailand
5. Faculty of Medicine; Khon Kaen University; Khon Kaen Thailand
6. Ministry of Education and Shanghai Key Laboratory of Children's Environmental Health; Xinhua Hospital; Shanghai Jiao Tong University; School of Medicine and School of Public Health; Shanghai China
7. Division for Diagnostic and Treatment Technology; Ministry of Health; Ulaanbaatar Mongolia
8. 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
9. School of Population Health; University of Western Australia; Perth Australia