1. Department of Cell Biology, National Translational Science Center for Molecular Medicine, Fourth Military Medical University, Xi'an, 710032, P. R. China
2. Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, P. R. China
3. Department of Oncology, Urumqi General Hospital of Lanzhou Military Command of PLA, Urumqi, 830000, P. R. China
4. Department of Oncology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, P. R. China
5. Cancer Institute, Fourth Military Medical University, Xi'an, 710038, P. R. China