1. Department of Endocrinology, University of Pisa, Pisa, Italy and Pathology Research Laboratory, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
2. Department of Endocrinology, University of Pisa, Pisa, Italy
3. Department of Neuroscience (ORL Section), University of Pisa, Pisa, Italy
4. Pathology Research Laboratory, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts