1. Chair of Cardiology; Second University of Naples; Naples Italy
2. Department of Medicine; St. Vincent's Hospital; University of Melbourne; Melbourne Australia
3. Department of Cardiology; Division of Heart and Lungs; University Medical Center Utrecht; Utrecht The Netherlands
4. Department of Cardiac Surgery; Istituto di Ricovero e Cura a Carattere Scientifico; Policlinico San Donato; San Donato Milanese Milan Italy
5. Cardiovascular Performance Program; Massachusetts General Hospital; Boston Massachusetts USA