1. Department of Medical Oncology, General Hospital of Northern Theater Command, Shenyang, Liaoning 110000, P.R. China
2. Department of Medical Oncology, General Hospital of Northern Theater Command, Shenyang, Liaoning 110000, P.R. China
3. Department of Oncology, General Hospital of Northern Theater Command, Jinzhou Medical University, Shenyang, Liaoning 121017, P.R. China
4. Department of Oncology, General Hospital of Northern Theater Command, China Medical University, Shenyang, Liaoning 110000, P.R. China