1. Department of Radiology Peking University Third Hospital, 49 Huayuan North Road, Haidian District Beijing China
2. Institute of Statistics and Big Data, Renmin University of China, 59 Zhongguancun Street, Haidian District Beijing China
3. Department of Radiology, He Bei Gu Cheng Xian Yi Yuan, 55 East Kangning Road, Zhengkou Town, Gucheng County Hebei China