1. Department of Medical Oncology , The First Hospital of China Medical University , Shenyang , P.R. China
2. The General Hospital of Northern Theater Command Training Base for Graduate , China Medical University , Shenyang , P.R. China
3. Clinical Medicine , Shenyang Medical College , Shenyang , P.R. China
4. Department of Thoracic Surgery , The First Hospital of China Medical University , Shenyang , P.R. China