[1] UCL, Sch Med, Dept Clin Biochem, London NW3 2QG, England
[2] Aristotle Univ Thessaloniki, Hippocrat Hosp, Propedeut Dept Internal Med 2, Atherosclerosis Unit, GR-54006 Thessaloniki, Greece
[3] Aristotle Univ Thessaloniki, Hippocrat Hosp, Propedeut Dept Internal Med 2, Metab Syndrome Unit, GR-54006 Thessaloniki, Greece
[4] Aristotle Univ Thessaloniki, AHEPA Hosp, Propedeut Dept Internal Med 1, Div Diabetol, GR-54006 Thessaloniki, Greece
[5] Edessa Hosp, Dept Internal Med, Edessa, Greece
[6] Agios Dimitrios Hosp, Internal Med Clin, Thessaloniki, Greece
[7] Hosp Psychiat, Dept Internal Med, Thessaloniki, Greece
[8] Serres Hosp, Dept Internal Med, Serres, Greece
[9] Hlth Ctr Agios Nikolaos, Chalkidiki, Greece