1. Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 138 Sheng Li Road, Tainan 70101, Taiwan
2. Departments of Internal Medicine, Tainan Municipal Hospital, Tainan 70103, Taiwan
3. Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
4. Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
5. Department of Public Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
6. Biostatistics Consulting Center, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
7. Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70456, Taiwan
8. National Institute of Cancer Research, National Health Research Institutes, Tainan 70456, Taiwan
9. Department of Internal Medicine, An Nan Hospital, China Medical University, Tainan 70965, Taiwan