1. Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
2. Pediatric Diabetes Unit, San Raffaele Scientific Hospital and Vita Salute San Raffaele University, Milan, Italy
3. ASST Cremona, Division of Pediatrics, Pediatric Diabetes, Endocrinology and Nutrition, Cremona, Italy
4. Department of Drug Science, University of Piemonte Orientale, Novara, Italy
5. Statistical Department, University of Piemonte Orientale, Novara, Italy