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. Paediatric Unit Azienda Ospedaliera Universitaria Policlinico Giovanni XXIII Bari Italy
5. Department of Pediatrics Sapienza University of Rome Rome Italy
6. Turin ‐ Istituto di Biomedicina e Immunologia molecolare Pediatric National Healthcare System Italian National Research Council Palermo Italy
7. Allergy Center Department of Pediatrics Istituto Giannina Gaslini Genoa Italy
8. Pediatric Unit ASST‐Rhodense RHO Milan Italy
9. Allergy Clinic Casa di cura Villa Montallegro Genoa Italy