1. Department of Radiology, Cathay General Hospital, Taipei, Taiwan
2. School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan
3. Department of Radiology, National Yang-Ming University Hospital, Yilan City, Taiwan
4. School of Medicine, Tzu-Chi University, Hualien, Taiwan
5. Department of Radiation Oncology, Buddhist Tzu-Chi General Hospital, Hualien, Taiwan
6. Department of Radiology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
7. Department of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung, Taiwan