1. Department of Rheumatology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
2. Microbiology Laboratory, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
3. 1st Division of Internal Medicine & Infectious Diseases Unit, University General Hospital of Ioannina, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece