Liverpool Centre for Cardiovascular Science, University of Liverpool and Liverpool Heart and Chest Hospital, William Henry Duncan Building, 6 West Derby Street, Liverpool, L78TX, UK. Department of Cardiology, Congenital Heart Diseases and Electrotherapy, Medical University of Silesia, Silesian Centre for Heart Diseases, Zabrze, Poland. Covance Inc, Cardiovascular/Metabolic, Maidenshead, UK. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark. Queen Giovanna University Hospital, Sofia, Bulgaria. 3rd Medical Department, Cardiology and Intensive Care Medicine, Medcial School, Wilhelminenhospital, and Sigmund Freud University, Vienna, Austria. Hôpital Saint Antoine, Hôpital Tenon; Université Pierre Et Marie Curie (Paris VI), Paris, France. Daiichi Sankyo Pharma Development, Basking Ridge, New York, USA. Daiichi Sankyo, Basking Ridge, New York, USA. St. Vincenz-Hospital, Paderborn, Germany. Working Group: Molecular Electrophysiology, University Hospital Magdeburg, Magdeburg, Germany. Liverpool Centre for Cardiovascular Science, University of Liverpool and Liverpool Heart and Chest Hospital, William Henry Duncan Building, 6 West Derby Street, Liverpool, L78TX, UK. gregory.lip@liverpool.ac.uk. Department of Cardiology, Congenital Heart Diseases and Electrotherapy, Medical University of Silesia, Silesian Centre for Heart Diseases, Zabrze, Poland. gregory.lip@liverpool.ac.uk. Aalborg Thrombosis Research Unit, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark. gregory.lip@liverpool.ac.uk.