[1] Aristotle Univ Thessaloniki, Hippokrat Hosp, Sch Med, Propedeut Dept Internal Med 2, Thessaloniki, Greece
[2] Aristotle Univ Thessaloniki, AHEPA Hosp, Sch Med, Propedeut Dept Internal Med 1, Thessaloniki, Greece
[3] Larissa Hosp, Cardiol Clin, Larisa, Greece
[4] UCL, Univ Coll Med Sch, Royal Free Hosp Campus, Dept Clin Biochem,Vasc Prevent Clin, London, England