1. Pediatric Clinic, Pietro Barilla Children’s Hospital, Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy
2. Primary Care Pediatricians, Local Health Agency of Modena, 41121 Modena, Italy
3. Primary Health Care Department, Local Health Agency of Modena, 41121 Modena, Italy
4. Primary Care Pediatricians, Local Health Agency of Genoa (ASL3), 16129 Genoa, Italy
5. Università degli Studi di Milano, 20122 Milan, Italy
6. Health Direction, Local Health Agency of Modena, 41121 Modena, Italy