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[\'Faculty of Medicine, National Heart and Lung Institute, Imperial College, London, UK.\', \'Cardiology Department, East and North Hertfordshire NHS Trust, Stevenage, UK.\', \'Department of Cardiology and Internal Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.\', \'Faculty of Medicine, University of Alberta, Edmonton, Canada.\', \'School of Life and Medical Sciences, Postgraduate Medical School, University of Hertfordshire, Stevenage, UK.\']
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