1Health & Family Planning Systems Programme, ICDDR,B, Bangladesh
2School of Education. Loyola University Chicago, USA
3Medical Research Council, Social & Public Health Sciences Unit, UK
4Campbell and Cochrane Equity Methods Group, Institute of Population Health, University of Ottawa, Canada
5Centre for Global Health, Departments of Medicine and Family Medicine, University of Ottawa, Canada
6Health Systems & Infectious Diseases Division, ICDDR,B, Bangladesh
7International Initiative for Impact Evaluation (3ie), UK
8South Asia Research Hub, Department for International Development, India