1 Department of Neuroscience, Ophthalmology Unit, University of Padua, Padova, Italy.
2 Allergy Unit, Meyer Children's Hospital, Florence, Italy.
3 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano - SC Pediatria Pneumoinfettivologia - Ambulatorio Allergologia Pediatrica, Milan, Italy.