1. 3rd Department of Internal Medicine, Papageorgiou General Hospital, Aristotle University of Thessaloniki, 56429 Thessaloniki, Greece
2. Second Medical Department, Hippokration General Hospital, Aristotle University of Thessaloniki, 54642 Thessaloniki, Greece
3. Rheumatology Department, Papageorgiou General Hospital, 56429 Thessaloniki, Greece
4. BMT Unit, Department of Haematology, G. Papanikolaou General Hospital, 57010 Thessaloniki, Greece