1. Department of Endocrinology and Nutrition Hospital Universitario Central de Asturias/University of Oviedo Oviedo Spain
2. Instituto de Investigación Sanitaria del Principado de Asturias (ISPA) Oviedo Spain
3. Department of Medicine University of Oviedo Oviedo Spain
4. Centre for Biomedical Network Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III Madrid Spain