1. Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
2. Master of Public Health Degree Program, College of Public Health, National Taiwan University, Taipei, Taiwan
3. Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
4. Arboviral Diseases Branch, Centers for Disease Control and Prevention, Fort, Fort Collins, Colorado, USA