1. University Hospitals Birmingham Queen Elizabeth Hospital Birmingham, Birmingham, UK
2. School of Nursing and Midwifery, University of Birmingham, Birmingham, UK
3. University of Warwick Clinical Trials Unit, Coventry, UK
4. University Hospitals Leicester, Leicester, UK
5. Hull York Medical School, York and Scarborough Teaching Hospitals, York, UK
6. King’s College London, London, UK
7. University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK