Affiliation: Infectious Diseases, Immunology and Rheumatology Unit, Second Department of Paediatrics, P. & A. Kyriakou Children's Hospital, Medical School, National and Kapodistrian University of Athens, and Pediatric Faculty, Medical School, University of Cyprus, Nicosia, Cyprus;
Affiliation: Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Infectious Diseases and Respiratory Medicine, Berlin, Germany; Cyprus International University, Faculty of Medicine, Nicosia, Cyprus.