1. Laboratory of Separative Techniques, IRCCS Ospedale San Raffaele, 20132 Milano, Italy
2. Unit of Metabolic Disease, Azienda Ospedaliera e Universita’, 35100 Padova, Italy
3. Endocrinology and Diabetes Unit, Istituto Clinico Humanitas, 20089 Rózzano, Milano, Italy
4. Institute of Endocrinological Science, IRCCS Ospedale Maggiore, 20122 Milano, Italy