1. Department of Internal Medicine, Endocrine-Metabolic Science and Biochemistry, Biochemistry Section; University of Siena; Siena; Italy
2. Department of Human Pathology and Oncology; University of Siena; Siena; Italy
3. Pathological Anatomy, Siena University Hospital; Siena; Italy
4. Laboratory of Clinical Pathology, Siena University Hospital; Siena; Italy