1. Division of Infectious Disease Control; Gyeonggi Provincial Government; Suwon Korea
2. Department of Epidemiology and Medical Informatics; Graduate School of Public Health; Korea University; Seoul Korea
3. Disease Diagnostic Team; Gyeonggi Province Veterinary Service; Suwon Korea
4. WHO Collaborating Centre for Infectious Disease Epidemiology and Control; School of Public Health; Li Ka Shing Faculty of Medicine; University of Hong Kong; Hong Kong China
5. Department of Preventive Medicine; Korea University College of Medicine; Seoul Korea