1. Diagnostic and Interventional Cardiology Department, Fondazione Toscana Gabriele Monasterio, 54100 Massa, Italy
2. CNR Institute of Clinical Physiology, 56124 Pisa, Italy
3. Adult Cardiosurgery Department, Fondazione Toscana Gabriele Monasterio, 54100 Massa, Italy
4. CNR Institute of Clinical Physiology, 54100 Massa, Italy
5. Fondazione Toscana Gabriele Monasterio, 56124 Pisa, Italy