1. ASST‐Melegnano Martesana Melzo Italy
2. Department of Earth and Environmental POLARIS University of Milan Bicocca Milan Italy
3. Agency for health protection of metropolitan area of Milan‐Hygiene and public health service Milan west Italy
4. Istituto di Scienze dell'Atmosfera e del Clima ISAC‐CNR Lecce Italy
5. Pediatric Clinic Fondazione IRCCS Policlinico San Matteo Pavia Italy
6. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences University of Pavia Pavia Italy