1. Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.
2. Departments of Laboratory Medicine and Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
3. Departments of Clinical Pathology and Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
4. Department of Clinical Pathology, Taichung Veterans General Hospital, Taichung, Taiwan.
5. School of Medical Technology, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.