1. 3rd Department of Internal Medicine, Papageorgiou HospitalAristotle University of Thessaloniki Thessaloniki Greece
2. Rheumatology Department, Papageorgiou HospitalAristotle University of Thessaloniki Thessaloniki Greece
3. Rheumatology Department, 2nd Propedeutic Department of Internal Medicine, Hippokration HospitalAristotle University of Thessaloniki Thessaloniki Greece