1. Pediatric Clinic Fondazione IRCCS Policlinico San Matteo Pavia Italy
2. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences University of Pavia Pavia Italy
3. Department of Pediatrics Allergy Unit University of Messina Messina Italy
4. Pediatric Unit Azienza Ospedaliera Universitaria Policlinico Giovanni XXIII Bari Italy
5. Department of Pediatrics Sapienza University of Rome Rome Italy
6. Pediatric National Healthcare System Turin ‐ Istituto di Biomedicina e Immunologia molecolareItalian National Research Council Palermo Italy
7. Allergy Center Department of Pediatrics Istituto Giannina Gaslini Genoa Italy
8. Pediatric Unit ASST‐RhodenseRHO Milan Italy
9. Allergy Clinic Casa di cura Villa Montallegro Genoa Italy