1. Third Department of Paediatrics, School of Medicine, Aristotle University, Thessaloniki, Greece, Infectious Diseases Unit, Hippokration General Hospital, Thessaloniki, Greece
2. Infectious Diseases Unit, Hippokration General Hospital, Thessaloniki, Greece, Second Propedeutic Department of Internal Medicine, School of Medicine, Aristotle University, Thessaloniki, Greece
3. Infectious Diseases Unit, Hippokration General Hospital, Thessaloniki, Greece