[1] San Raffaele, Intervent Cardiol Unit, Milan, Italy
[2] Careggi Hosp, Div Cardiol, Florence, Italy
[3] Ferrarotto H, Clin Div Cardiol, Catania, Italy
[4] Royal Brompton Hosp, Dept Cardiol, London SW3 6LY, England
[5] Heart Ctr Siegbu, Dept Cardiol, Siegburg, Germany