School of Medicine, University of Leeds, Worsley Building, Woodhouse, UK.; Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, Leeds, UK. Leeds Vascular Institute, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK.; Medicines Management and Pharmacy Service, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK. Leeds Vascular Institute, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK. Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, Leeds, UK.; Leeds Vascular Institute, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK.. Electronic address: m.a.bailey@leeds.ac.uk.