1. Department of Experimental and Clinical Biomedical Sciences, Endocrinology Unit, University of Florence, Italy
2. Department of Experimental and Clinical Medicine, Histology and Embryology Unit, University of Florence, Italy
3. Department of Experimental and Clinical Medicine, Section of Physiological Sciences, University of Florence, Italy
4. Department of Experimental and Clinical Medicine, Haematology Unit, University of Florence, Italy
5. Italian National Research Council, Institute of Applied Physics, Sesto Fiorentino, Italy
6. Departament de Bioquimica i Biologia Molecular, Institute of Biomedicine, University of Barcelona, and Centro de Investigación Biomédica en Red Fisiopatologia de la Obesidad y Nutrición, Barcelona, Catalonia, Spain
7. Department of Experimental and Clinical Medicine, Section of Anatomy and Histology, University of Florence, Florence, Italy