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.