1. Department of Cardiology, Yeditepe University Hospital , Içerenkoy querter, Hastane Street No:4 D:4/1, 34854 Atasehir/Istanbul , Turkey
2. Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary , Calgary, Alberta T2N 1N4 , Canada
3. Department of Cardiology, Hammersmith Hospital, National Heart & Lung Institute, Imperial College , London W12 0HS , United Kingdom