1. Department of Internal Medicine, University of Patras Medical School, 26504 Rion, Greece
2. Department of Internal Medicine, Division of Hematology, University of Patras Medical School, 26504 Rion, Greece
3. Department of Internal Medicine, Division of Oncology, University of Patras Medical School, 26504 Rion, Greece
4. Department of Internal Medicine, Division of Rheumatology, University of Patras Medical School, 26504 Rion, Greece