[1] Aristotle Univ Thessaloniki, Dept Internal Med 4, GR-54006 Thessaloniki, Greece
[2] Aristotle Univ Thessaloniki, Dept Internal Med 3, Papageorgiou Hosp, GR-54006 Thessaloniki, Greece
[3] Aristotle Univ Thessaloniki, Dept Transplant Surg, GR-54006 Thessaloniki, Greece
[4] Aristotle Univ Thessaloniki, Propaedeut Dept Internal Med 2, GR-54006 Thessaloniki, Greece