1. Third Department of Surgery, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
2. Endocrine Unit, 2nd Propaedeutic Department of Internal Medicine and Research Institute, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
3. ENT Department, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
4. Department of Cytopathology, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
5. Department of Internal Medicine, Section of Medical Oncology, School of Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece