Dr. Jose-Manuel Gomez-Saez is a Physical Doctor, Medical Doctor, Associated Professor Teaching Unit of Bellvitge in School of Medicine at University of Barcelona & Chief Clinician in the Department of Endocrinology at University Hospital of Bellvitge. He is a Researcher of CIBERDEM (Centro de Investigacio'n Biome'dica en Red de Diabetes y Enfermedades Metabo'licas Asociadas). Dr. Jose is an endocrinologist working in a third level hospital as clinical doctor and also as a teacher of the University of Barcelona and a clinical rechearcher; he had published 130 articles in international journals with elevated impact factor an also 231 articles in Spanish journals, 51 books or books chapters and 89 communications to international congress. His field of expertise is endocrinology and into this area, thyroid, pituitary and parathyroid diseases and obesity. Dr. Jose is one of the best physicians to treat thyroid cancer, decreased secretion of pituitary hormones, excessive secretion of growth hormone and hypothyroidism.