1. Center for Inclusive Policy, Washington, DC 20005, USA
2. International Centre for Evidence on Disability, London WC1E 7HT, UK
3. Independent Researcher, Oxford OX3 0JE, UK
4. UNICEF, New York, NY 10017, USA
5. Gender and Health Research Unit, South African Medical Research Council, Durban 4091, South Africa
6. School of Health Science, University of KwaZulu-Natal, Durban 4041, South Africa
7. Department of Economics, Fordham University, New York, NY 10458, USA
8. School of Social Welfare, State University of New York at Stony Brook, Stony Brook, NY 11790, USA
9. Prospera, Jakarta 12190, Indonesia
10. Facultad de Medicina, Universidad de los Andes, Bogota 111711, Colombia