1. Scuola di Specializzazione in Pediatria University of Bari “Aldo Moro” Bari Italy
2. Department of Paediatrics, Faculty of Medicine The Chinese University of Hong Kong Sha Tin China
3. Pediatric Allergy Unit, Department of Pediatrics, Gynecology and Obstetrics University Hospitals of Geneva Geneva Switzerland
4. Department of Pediatric Pulmonology and Allergy, Assistance Publique Hôpitaux de Paris Hôpital Necker Enfants Malades and University of Paris Cité Paris France