1. Faculty of Medicine National Heart and Lung Institute Imperial College London UK
2. Cardiology Department East and North Hertfordshire NHS Trust Stevenage UK
3. Department of Cardiology and Internal Medicine Collegium MedicumNicolaus Copernicus University Bydgoszcz Poland
4. Faculty of Medicine University of Alberta Edmonton Canada
5. School of Life and Medical Sciences Postgraduate Medical School University of Hertfordshire Stevenage UK