1. Department of Oncology, General Hospital of Western Theater Command, Chengdu, Sichuan 610083, P.R. China
2. Institut de Cancérologie Lucien Neuwirth, 42270 Saint Priest en Jarez, France
3. Cancer Center, Institute of Surgical Research, Third Affiliated Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, P.R. China
4. Cancer Center, The Third Affiliated Hospital of Chongqing Medical University (Jie Er Hospital), Chongqing 401120, P.R. China