1. Department of Radiology, Seoul National University Hospital, Seoul, Korea
2. Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan, Republic of China
3. Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan, Republic of China
4. Center for Functional Onco-Imaging and Department of Radiological Sciences, University of California, Irvine, CA, USA
5. Department of Radiology, E-Da Hospital and I-Shou University, Kaohsiung, Taiwan, Republic of China
6. Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan, Republic of China