1. Nottingham Clinical Trials Unit, School of Medicine, University of Nottingham, Nottingham, UK
2. Institute of Applied Health Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
3. Centre for Women’s Health, Institute of Population Health Sciences, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
4. Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
5. Birmingham Women’s and Children’s NHS Foundation Trust, Birmingham, UK
6. Group B Strep Support, Haywards Heath, UK
7. Institute of Metabolism and System Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK