1. Department of Medical Oncology of Cancer Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
2. Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang, P.R. China
3. Teaching and Research Section of Oncology, Guizhou Medical University, Guiyang, P.R. China
4. Department of Oncology, The Affiliated Tumor Hospital of Guizhou Medical University, Guiyang, P.R. China
5. Department of Oncology and Hematology, The First People’s Hospital of Longquanyi District, Chengdu, P.R. China