1. 2nd Department of Pediatrics, Aristotle University of Thessaloniki, School of Medicine, Ahepa General Hospital, St. Kiriakidi 1, 54636 Thessaloniki, Greece
2. Department of Pathology, Aristotle University of Thessaloniki, School of Medicine, Ahepa General Hospital, St. Kiriakidi 1, 54636 Thessaloniki, Greece