1. Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
2. Center of Infection Control, National Taiwan University Hospital, Taipei, Taiwan
3. Department of Medicine, National Taiwan University Cancer Center, Taipei, Taiwan
4. Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu, Taiwan
5. Department of Tropical Medicine and Parasitology, National Taiwan University College of Medicine, Taipei, Taiwan
6. Min-Sheng General Hospital, Taoyuan, Taiwan
7. Department of Internal Medicine, National Taiwan University Hospital Yunlin Branch, Yunlin, Taiwan