1. Tommy’s National Centre for Miscarriage Research, Institute of Metabolism and Systems Research (IMSR), WHO Collaborating Centre for Global Women’s Health Research; University of Birmingham; Birmingham UK
2. Institute of Applied Health Research, College of Medical and Dental Sciences; University of Birmingham; Birmingham UK
3. University of Birmingham; Birmingham UK
4. Test Evaluation Research Group, Institute of Applied Health Research; University of Birmingham; Birmingham UK
5. UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Sexual and Reproductive Health and Research; World Health Organization; Geneva Switzerland
6. Concept Foundation; Geneva Switzerland