1. Unidade de Enfermedades Tiroideas e Metabolicas (UETeM), Department of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain.
2. Division of Endocrinology, Department of Internal Medicine, Texas Tech University Health Sciences Center School of Medicine, Lubbock, Texas.
3. Instituto de Investigaciones Biomedicas (IIBM) Madrid, Centro mixto CSIC-UAM, Madrid and CIBER de Fisiopatologia de la Obesidad y Nutricion (CIBEROBN), ISCIII, Madrid, Spain.