1. Pediatric Diabetes and Metabolic Disorders Unit, Department of Surgery, Dentistry, Pediatrics and Gynecology, Regional Center for Pediatric Diabetes, University Hospital of Verona , 37126 Verona , Italy
2. Regional Pediatric Diabetes Center, Department of Translational Medical Sciences, Section of Pediatrics, Federico II University of Naples , 80138 Naples , Italy
3. Regional Cystic Fibrosis Center, Department of Translational Medical Sciences, Section of Pediatrics, Federico II University of Naples , 80138 Naples , Italy
4. Cystic Fibrosis Unit, Regional Center for Cystic Fibrosis, University Hospital of Verona , 37126 Verona , Italy
5. Department of Medicine, Section of Endocrinology, University Hospital of Verona , 37126 Verona , Italy
6. Department of Medicine and Surgery, University of Parma , 43121 Parma , Italy
7. Division of Endocrinology and Metabolic Diseases, Azienda Ospedaliero-Universitaria di Parma , 43126 Parma , Italy