1 Pediatric and Adolescent Unit, Department of Internal Medicine, University of Pavia, P.le Golgi n.2, 27100, Pavia, Italy. valeria.calcaterra@unipv.it.
2 Pediatric Endocrinology Unit, Department of Maternal and Children's Health, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy. valeria.calcaterra@unipv.it.
3 Pediatric and Adolescent Unit, Department of Internal Medicine, University of Pavia, P.le Golgi n.2, 27100, Pavia, Italy.
4 Pediatric Endocrinology Unit, Department of Maternal and Children's Health, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
5 Regional Center of Pediatric Diabetology "G.Stoppoloni", Department of Pediatrics, University of Campania "Luigi Vanvitelli", Naples, Italy.