1. Department of Thoracic Surgery, Medical Faculty, University of Van Yuzuncu Yil, Van, Turkey
2. Department of Thoracic Surgery, Training and Research Hospital, Van, Turkey
3. Department of Gastroenterology, Medical Faculty, University of Van Yuzuncu Yil, Van, Turkey
4. Department of General Surgery, Medical Faculty, University of Van Yuzuncu Yil, Van, Turkey
5. Department of Surgical Oncology, Medical Faculty, University of Van Yuzuncu Yil, Van, Turkey