1. Department of Endocrinology and Metabolism (L.A., R.E., E.M., L.G., A.P.), University of Pisa, 56100 Pisa, Italy
2. Department of Endocrinology (S.M., P.M.), Department of Medical Sciences “M. Aresu,” Endocrinology and Metabolism, University of Cagliari, 09042 Cagliari, Italy
3. Departments of Internal Medicine, Endocrinology and Metabolism, and Biochemistry (F.P.), University of Siena, 53100 Siena, Italy
4. Department of Statistics and Applied Mathematics to Economy (L.M.), University of Pisa, 56124 Pisa, Italy
5. Department of Research Institute of Radiation Medicine (T.M., T.V., A.A.), 220600 Minsk, Belarus
6. Institute of Endocrinology and Metabolism (M.D.T.), Academy of Medical Sciences of the Ukraine, 254114 Kiev, Ukraine
7. Institute of Medical Radiological Research Center (A.T.), 249020 Obninsk, Kaluga Region, Russia
8. Department of Medical Endocrinology (U.F.-K.), Rigshospitalet, 2100 Copenhagen, Denmark
9. Department of Growth and Reproduction (A.J.), Rigshospitalet, University of Copenhagen, DK-1017 Copenhagen, Denmark