1. First Propedeutic Department of Internal Medicine, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Department of Endocrinology and Metabolism, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Second Laboratory of Nuclear Medicine, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece