[1] Univ Athens, Sch Med, Dept Internal Med 4, GR-11527 Athens, Greece
[2] Aristotle Univ Thessaloniki, Sch Med, Dept Pharmacol, GR-54006 Thessaloniki, Greece
[3] Aristotle Univ Thessaloniki, Sch Med, Paediat Surg Dept 1, GR-54006 Thessaloniki, Greece