Giulio Marchesini1, Michael Roden2, Roberto Vettor3. 1. Department of Medical and Surgical Sciences (DIMEC), "Alma Mater" University, Bologna, Italy. Electronic address: giulio.marchesini@unibo.it. 2. Department of Endocrinology and Metabolic Diseases, Heinrich Heine University, Düsseldorf, Germany. 3. Department of Medicine (DIMED), University of Padua, Padua, Italy.