1. Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
2. Department of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
3. Department of Microbiology and Immunology, School of Medicine, China Medical University, Taichung, Taiwan
4. Division of Infectious Diseases, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
5. Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
6. Department Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan