1. Department of Clinical Sciences and Community Health (F.M.E., M.F., A.M.B., E.P., P.B.-P., A.S., G.M.), 20122 Milan, Italy
2. Department of Public Health and Pediatrics (L.d.S.), University of Turin, and Regina Margherita Children's Hospital, 10126 Turin, Italy
3. Endocrinology and Diabetology Unit, University of Milan, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico, Ca' Granda Ospedale Maggiore Policlinico, and Center of Molecular and Genetic Epidemiology (V.B., L.T.), Department of Clinical Sciences and Community Health, Università di Milano and Fondazione Cà Granda Istituto di Ricovero e Cura a Carattere Scientifico, Ospedale Maggiore Po