1. Department of Radiation Oncology, Lianshui County People's Hospital, Huaian, Jiangsu 223400, P.R. China
2. Department of Clinical Laboratory, Lianshui County People's Hospital, Huaian, Jiangsu 223400, P.R. China
3. Clinical Laboratory, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China