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Authored by Drs Sohel Samad, Christopher Christou and Peter Xiang, Health Education East of England - Drs Vanessa Fludder, Tom Richards and Chris Swaine, Brighton and Sussex University Hospitals - Dr Christopher Sharpe, Norfolk and Norwich University Hospital - Dr Richard Haddon, Serena Goon, Lisa Grimes and Rowan Burnstein, Cambridge University Hospital - Dr Beth Perritt, Countess of Chester Hospital - Dr Pallab Rudra, Bedford Hospital