1. Unidade de Enfermedades Tiroideas e Metabolicas (D.P.-G., I.C.-P., J.L.-A.), School of Medicine, University of Santiago de Compostela, E-15782 Spain;
2. Cell and Molecular Biology Program and the Division of Metabolism, Endocrinology and Diabetes (J.L., P.A.), University of Michigan Medical Center, Ann Arbor, Michigan 48109;
3. Centro de Saude de Santa Comba (J.R.-F.), Complexo Hospitalario Universitario de Santiago, Consellería de Sanidade e Servicio Galego de Saúde, Santiago de Compostela, E-15706 Spain;
4. Division of Endocrinology (I.C.-P., J.L.-A.), TexasTech University Health Sciences Center-School of Medicine, Lubbock, Texas 79430;
5. Departments of Pathology (J.C.-T., A.B.) School of Medicine, University of Santiago de Compostela, E-15782 Spain;
6. Servicio de Anatomia Patologica (J.C.-T., A.B.), Complexo Hospitalario Universitario de Santiago, Consellería de Sanidade e Servicio Galego de Saúde, Santiago de Compostela, E-15706 Spain;
7. Department of Physiology (S.B.B., C.V.A.), School of Medicine, University of Santiago de Compostela, E-15782 Spain;
8. Department of Internal Medicine, Department of Cell Biology and Biochemistry (D.M.H., J.L.-A.), TexasTech University Health Sciences Center-School of Medicine, Lubbock, Texas 79430;
9. Laboratorio de Biología Molecular (H.M.T.), Cátedra de Genética y Biología Molecular, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Ciudad de Buenos Aires, 1428 Argentina