Tahseen A Chowdhury1, Hannah Cheston2, Anne Claydon2. 1. Department of Diabetes and Metabolism, Barts Health NHS Trust, The Royal London Hospital Whitechapel, London E1 1BB, UK Tahseen.Chowdhury@bartshealth.nhs.uk. 2. Department of Diabetes and Metabolism, Barts Health NHS Trust, The Royal London Hospital Whitechapel, London E1 1BB, UK.