1. Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei 100, Taiwan
2. Department of Surgery, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu County 300, Taiwan
3. Department of Surgery, National Taiwan University Hospital Jin-Shan Branch, New Taipei City 208, Taiwan
4. Department of Medical Imaging, National Taiwan University Cancer Center, Taipei 106, Taiwan
5. Department of Medical Imaging, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei 100, Taiwan