1. First Department of Microbiology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece - WHO Collaborating Centre for Research and Reference on Arboviruses and Hemorrhagic Fever Viruses
2. Department for Interventions in Health-Care Facilities, Hellenic Center for Disease Control and Prevention, Athens, Greece
3. First Department of Internal Medicine, Democritus University of Thrace Medical