1. Unit of Endocrinology; Department of Biomedical, Metabolic and Neural Sciences; University of Modena and Reggio Emilia; Modena Italy
2. Azienda Ospedaliero-Universitaria di Modena; Ospedale Civile di Baggiovara; Modena Italy
3. Department of Endocrinology; University Hospitals Leuven; Leuven Belgium
4. Department of Clinical and Experimental Medicine; Laboratory of Clinical and Experimental Endocrinology; KU Leuven; Leuven Belgium
5. Department of Laboratory Medicine; University Hospitals Leuven; Leuven Belgium