[1] Aristotle Univ Thessaloniki, Propedeut Dept Internal Med 1, Thessaloniki, Greece
[2] Univ Thessaly, Dept Internal Med, Larisa, Greece
[3] Univ Ioannina, Dept Internal Med, Ioannina, Greece
[4] Natl & Kapodistrian Univ Athens, Dept Med, Athens, Greece
[5] Aristotle Univ Thessaloniki, Lab Med Informat, Thessaloniki, Greece
[6] Aristotle Univ Thessaloniki, Propedeut Dept Internal Med 2, Thessaloniki, Greece