1. Department of Rheumatology, General Hospital of Patras “St. Andrews”, Patras, Greece
2. Department of Internal Medicine, General Hospital of Kalamata, Kalamata, Greece
3. Department of Gastroenterology, General Hospital of Kalamata, Kalamata, Greece
4. Department of Microbiology, General Hospital of Sparta, Sparta, Greece
5. Department of Internal Medicine, University Hospital of Patras, Rion, Greece