1. Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing, People's Republic of China
2. Department of Oncology, Haimen People's Hospital, Haimen, People's Republic of China
3. Department of Medical Oncology, Nanjing Medical University Affiliated Cancer Hospital of Jiangsu Province, Cancer Institution of Jiangsu Province, Nanjing, People's Republic of China
4. Department of Oncology, The Affiliated Jiangyin Hospital, School of Medicine, Southeast University, Jiangyin, People's Republic of China