1. Department of Radiology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China
2. Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, 510080, China
3. Department of Diagnostic Radiology, The University of Hong Kong, Hong Kong
4. Faculty of Medicine and Dentistry, University of Western Australia, Perth, Australia