1. Department of Radiology, Affiliated Hospital of Jiangsu University, Zhenjiang 212013, P. R. China
2. Jiangsu Key Laboratory of Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, P.R. China
3. Afliated Third Hospital of Zhenjiang, Jiangsu University, Zhenjiang 212013, P.R. China
4. Xiangshan Community Health Service Center in Jingkou District, Zhenjiang 212000, P.R. China