1. Department of Oncology and
2. Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan;
3. National Taiwan University Cancer Center and
4. Graduate Institute of Oncology, College of Medicine, National Taiwan University, Taipei, Taiwan;
5. National Institute of Cancer Research, National Health Research Institutes, Tainan, Taiwan;
6. Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan;
7. Department of Internal Medicine, National Cheng-Kung University Hospital, Tainan, Taiwan; and
8. Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan