[1] Natl & Kapodistrian Univ Athens, Sch Med, Dept Pathophysiol, Athens, Greece
[2] Univ Ioannina, Unit Med Technol & Intelligent Informat Syst, Ioannina, Greece
[3] Univ Ioannina, Sch Med, Dept Internal Med, Rheumatol Clin, Ioannina, Greece
[4] Dept Clin & Expt Med, Rheumatol Unit, Pisa, Italy
[5] Harokopio Univ Athens, Dept Nutr & Clin Dietet, Athens, Greece
[6] Acad Athens, Athens, Greece