[1] Queen Elizabeth Hosp, Birmingham B15 2TH, W Midlands, England
[2] Addenbrookes Hosp, Cambridge, England
[3] St James Univ Hosp, Leeds LS9 7TF, W Yorkshire, England
[4] Royal Infirm Edinburgh NHS Trust, Edinburgh, Midlothian, Scotland
[5] Kings Coll Hosp London, London, England
[6] Royal Free Hosp, London NW3 2QG, England
[7] Freeman Rd Hosp, Newcastle Upon Tyne NE7 7DN, Tyne & Wear, England