Kostas Markou is an endocrinologist and has worked in the Department of Internal Medicine/Department of Endocrinology at the University Hospital of Patras Medical School since 1989. He holds a Ph.D. degree in Medicine from the School of Medicine, the University of Athens. His main clinical and research interest is thyroidology, in particular the role of iodine in thyroid physiology and pathology. He has long-standing clinical and teaching experience in thyroid endocrinopathies. He is a founding member and team leader of the Programme for the Study and Eradication of Iodine Deficiency in Azerbaijan, Uzbekistan, and Georgia, organized by “Iodaction group” under the auspices of the University of Patras, the Ministry of External Affairs and the Ministry of Education. He is a member of the Greek Representative of the Iodine Global Network (IGN, formerly International Council for the Control of Iodine Deficiency Disorders Global Network, ICCIDD).