1. University of Birmingham; Tommy’s National Centre for Miscarriage Research, Institute of Metabolism and Systems Research; C/o Academic Unit, 3rd Floor, Birmingham Women's Hospital Foundation Trust Mindelsohn Way Birmingham UK B15 2TG
2. University of Birmingham; School of Health and Population Sciences; Birmingham UK B15 2TG
3. University of Liverpool; Cochrane Pregnancy and Childbirth Group, Department of Women's and Children's Health; Liverpool UK
4. Centro Rosarino de Estudios Perinatales (CREP); Moreno 878, 6to piso Rosario Santa Fe Argentina S2000DKR
5. World Health Organization; UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Reproductive Health and Research; 20 Avenue Appia Geneva Switzerland 1211
6. Walter Sisulu University, University of Fort Hare, University of the Witwatersrand, Eastern Cape Department of Health; East London South Africa
7. World Health Organization; Geneva Switzerland
8. Burnet Institute; Maternal and Child Health; 85 Commercial Road Melbourne Australia