1. Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
2. Department of Radiology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Zhongshan, Guangdong, China
3. Department of Pathology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
4. Department of Diagnostic Imaging, Sault Area Hospital, Sault Ste Marie, ON, Canada