1. Department of Radiology, The First People's Hospital of Foshan, Foshan, Guangdong 528000, P.R. China
2. Clinical Research Institute, The First People's Hospital of Foshan, Foshan, Guangdong 528000, P.R. China
3. Department of Radiology, The Sanshui People's Hospital, Foshan, Guangdong 528100, P.R. China
4. Department of Radiology, The Foshan Chancheng District Central Hospital, Foshan, Guangdong 528000, P.R. China
5. Department of Radiology, The Foshan Medicine Hospital, Guangdong 528000, P.R. China
6. Department of Radiology, The Second People's Hospital of Nanhai District, Foshan, Guangdong 528000, P.R. China