1. Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital , Liverpool , UK
2. Danish Center for Health Services Research, Department of Clinical Medicine, Aalborg University , Aalborg , Denmark
3. Department of Clinical Sciences and Community Health, University of Milan , Milan , Italy
4. Division of Subacute Care, IRCCS Istituti Clinici Scientifici Maugeri , Milan , Italy
5. School of Medicine, Belgrade University , Belgrade , Serbia
6. Cardiology Clinic, University Clinical Centre of Serbia , Belgrade , Serbia
7. Massachusetts General Hospital , Boston, MA , USA
8. Clinical Academic Group, Molecular and Clinical Sciences Institute, St. George’s University of London , Cranmer Terrace London SW17 0RE , UK
9. Cardiology Division, Department of Medicine, School of Clinical Medicine, LKS Faculty of Medicine, University of Hong Kong , Hong Kong , China
10. Medizinische Klinik II: Kardiologie und Intensivmedizin, St. Vincenz-Krankenhaus Paderborn , Am Busdorf 2, 33098 Paderborn , Germany
11. Department of Cardiology, School of Medical Sciences, Faculty of Medicine and Health, Örebro University , Örebro , Sweden
12. Department of Cardiology, Liverpool Heart & Chest Hospital , Liverpool , United Kingdom
13. Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena , via del Pozzo 71, 41125 Modena , Italy