1. Division of Cardiology, Mauriziano Hospital Turin, Italy
2. Division of Cardiology, MariaVittoria Hospital Turin, Italy
3. Department of Cardiology, Royal Brompton Hospital and Imperial College London, SW3 6NP, UK
4. LARC (Laboratorio Analisi e Ricerca Clinica) C.so Venezia 10—Turin – Italy and School of Medicine—, Insubria University, Varese, Italy