1. Endocrine Unit, Department of Pathophysiology, Laikon General Hospital, University of Athens Medical School, Athens, Greece.
2. Department of Otolaryngology/Head and Neck Surgery, Venizeleio-Pananeio General Hospital, Herakleion, Greece.
3. Endocrine Unit, First Department of Internal Medicine, Laikon General Hospital, University of Athens Medical School, Athens, Greece.
4. Department of Pathology, Venizeleio-Pananeio General Hospital, Herakleion, Greece.
5. Second Department of Propedeutic Surgery, Laikon General Hospital, University of Athens Medical School, Athens, Greece.