[1] Aristotle Univ Thessaloniki, Hippocrat Hosp, Propedeut Dept Internal Med 2, Atherosclerosis Unit, GR-54006 Thessaloniki, Greece
[2] Univ Ioannina, Sch Med, Dept Internal Med, GR-45110 Ioannina, Greece
[3] UCL Royal Free & Univ Coll, Royal Free Hosp, Sch Med, Dept Clin Biochem,Vasc Dis Prevent Clin, London, England