1 Department of Medicine and Surgery, University of Milano Bicocca, 20126 Milan, MI, Italy; Diabetes Unit, Niguarda Ca` Granda Hospital, Piazza Ospedale Maggiore 3, 20162 Milan, MI, Italy.
2 Diabetes Unit, Niguarda Ca` Granda Hospital, Piazza Ospedale Maggiore 3, 20162 Milan, MI, Italy.
3 Diabetes Unit, Niguarda Ca` Granda Hospital, Piazza Ospedale Maggiore 3, 20162 Milan, MI, Italy. Electronic address: basilio.pintaudi@ospedaleniguarda.it.