1. Unit for Bone Metabolism Diseases and Diabetes and Lab of Endocrine and Metabolic Research, IRCCS, Istituto Auxologico Italiano , 20149 Milan , Italy
2. Endocrinology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico , 20122 Milan , Italy
3. Department of Clinical Sciences and Community Health, University of Milan , 20122 Milan , Italy
4. Diabetes Center, Humanitas Gavazzeni Institute , 24125 Bergamo , Italy