1. Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
2. Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
3. School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
4. Department of Radiology, University of Cambridge, Cambridge, United Kingdom
5. Office of the Superintendent, Taipei Veterans General Hospital, Hsinchu Branch, Hsinchu, Taiwan, ROC
6. Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC