1. School of Public Health, Nantong University, Nantong, Jiangsu 226019, P.R. China
2. Institute of Materials Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, P.R. China
3. Nantong Tumor Hospital, Nantong, Jiangsu 226362, P.R. China
4. Medical School of Nantong University, Nantong, Jiangsu 226019, P.R. China
5. Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
6. Department of Radiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing University, Nanjing, Jiangsu 210008, P.R. China