1. Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, PR China
2. Department of Respiration, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing 210000, PR China
3. Department of Thoracic Surgery, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, PR China
4. Department of Radiation Oncology, Jiangsu Cancer Hospital, Nanjing 210009, PR China
5. Department of Gastroenterology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, PR China