1. Department of Thoracic and Abdominal Radiotherapy, The Third Clinical Medical College (Affiliated Tumor Hospital) of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
2. Department of Thoracic Surgery, The Third Clinical Medical College (Affiliated Tumor Hospital) of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China