1. Department of Lung Cancer, Affiliated Hospital of Academy of Military Medical Sciences of PLA, Fengtai, Beijing, China.
2. Department of Oncology, PLA General Hospital, Haidian, Beijing, China.
3. Department of Oncology, Changzheng Hospital, Shanghai, China.
4. Department of Gastrointestinal Oncology, Affiliated Hospital of Academy of Military Medical Sciences of PLA, Fengtai, Beijing, China.
5. Transformation Medical Center, Affiliated Hospital of Academy of Military Medical Sciences of PLA, Fengtai, Beijing, China.