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.