Ìå ôç óõíåñãáóßá ôçò ÅëëçíéêÞò Åôáéñåßáò Ðáéäéáôñéêþí Ëïéìþîåùí Õðü ôçí áéãßäá ôçò With co-operation of the Hellenic Society for Pediatric Infectious Diseases Under the auspices of the Hellenic Society for Infectious Diseases