[1] Univ Perugia, I-06100 Perugia, Italy
[2] Univ Amsterdam, Acad Med Ctr, Dept Vasc Med, NL-1105 AZ Amsterdam, Netherlands
[3] Dept Internal Med, Cecina, Italy
[4] Med Univ, Dept Internal Med & Cardiol, Warsaw, Poland
[5] San Carlo Borromeo Hosp, Dept Cardiol, Milan, Italy
[6] Careggi Univ Hosp, Florence, Italy
[7] Democritus Univ Thrace, Dept Cardiol, Alexandroupolis, Greece