1. Cardiothoracic Centre, Guy's and St Thomas' Hospital London UK
2. King's College London London UK
3. Cardiovascular Department A.O.U. Ospedali Riuniti Trieste Italy
4. Cardiology Clinical and Academic Group, St George's, University of London, London and St George's University Hospital NHS Foundation Trust London UK
5. Royal Brompton Hospital London UK
6. Cardiomyopathy Unit, Careggi University Hospital Florence Italy
7. Centro Cardiologico Universitario di Ferrara, University of Ferrara Ferrara Italy
8. Maria Cecilia Hospital, GVM Care & Research Cotignola Italy