1. Women's Health Research Unit – Blizard Institute – Barts and the London School of Medicine and dentistry, Queen Mary University, London, UK;
2. Birmingham Women's Hospital – Mindelsohn Way, Birmingham, UK;
3. Birmingham Centre for Women’s and Children’s Health, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK;
4. The Maternity Centre, University Hospital of North Staffordshire, Stoke-On-Trent, UK;
5. Clinical Education Centre, Keele University, Staffordshire, UK