1. University of Bristol; Population Health Sciences, Bristol Medical School; Department of Women's and Children's Health The Chilterns Bristol UK BS10 5NB
2. Royal United Hospital NHS Foundation Trust; Women and Children's Division; Coombe Park Bath UK BA1 3NG
3. North Bristol Trust; Learning and Research, Southmead Hospital Bristol UK BS10 5NB
4. University of Bristol; Translational Health Sciences, Bristol Medical School; Bristol UK
5. North Bristol NHS Trust, Southmead Hospital; Anaesthetic Department; Bristol UK BS10 5NB
6. North Bristol NHS Trust; Department of Women's Health; Bristol UK
7. University College London; UCL EGA Institute for Women's Health; 86-96 Chenies Mews Bloomsbury London UK WC1E 6HX