1. Imam Khomeini Complex Hospital, Cancer Institute Tehran University of Medical Sciences Tehran Iran
2. Division of Surgical Oncology, Cancer Institute Tehran University of Medical Sciences Tehran Iran
3. Otorhinolaryngology Research Center Tehran University of Medical Sciences Tehran Iran
4. Anatomical and clinical pathology, Cancer Institute, IKHC Tehran University of Medical Sciences Tehran Iran
5. Resident of Internal Medicine, IKHC Tehran University of Medical Sciences Tehran Iran
6. Department of Nuclear Medicine, Valiasr Hospital Tehran University of Medical Sciences Tehran Iran