[1] Friedrich Alexander Univ Erlangen Nuremberg, Dept Internal Med Rheumatol & Immunol 3, Erlangen, Germany
[2] Univ Klinikum Erlangen, Erlangen, Germany
[3] Natl & Kapodistrian Univ Athens, Sch Med, Athens, Greece
[4] MedStar Georgetown Univ Hosp, Dept Med, Washington, DC USA
[5] Attikon Univ Hosp, Unit, Athens, Greece
[6] Univ Crete, Rheumatol Clin Immunol & Allergy Dept, Med Sch, Iraklion, Greece
[7] Fdn Res & Technol Hellas FORTH, Inst Mol Biol & Biotechnol, Iraklion, Greece
[8] Natl & Kapodistrian Univ Athens, Athens, Greece