1. Laboratory of Medical Science, Institute of Life Sciences, Via G. Moruzzi, 1, Scuola Superiore Sant’Anna, 56124 Pisa, Italy.
2. Cardiac and Thoracic Department, Azienda Ospedaliero – Universitaria Pisana, Pisa, Italy.
3. Fondazione CNR – Regione Toscana “G. Monasterio”, Pisa, Italy.
4. Institute of Clinical Physiology, CNR, Pisa, Italy.