1. Birmingham Centre for Women’s & Children’s Health & School of Clinical and Experimental Medicine; College of Medical and Dental Sciences; University of Birmingham; Birmingham UK
2. Fetal Medicine Centre; Birmingham Women's Hospital NHS Foundation Trust; Birmingham UK
3. Obstetrics Division; Hospital Italiano de Buenos Aires; Buenos Aires Argentina
4. University North Staffordshire NHS Trust Hospital; Stoke on Trent UK
5. School of Clinical Sciences; the University of Nottingham; Nottingham UK
6. School of Health and Population Sciences; University of Birmingham; Birmingham UK
7. Institute of Cellular Medicine; Newcastle University; Newcastle upon Tyne UK
8. Women's Health Research Unit; The Blizard Institute; Barts and The London School of Medicine; Queen Mary; University of London; London UK