1 Taiwan Centers for Disease Control, Ministry of Health and Welfare, Taipei, Taiwan.
2 Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan.
3 Health Data Research Center, National Taiwan University, Taipei, Taiwan.
4 Division of Infectious Diseases, Department of Internal Medicine, Chang-Gung Memorial Hospital, Chang-Gung University College of Medicine, Taoyuan, Taiwan.
5 Division of Infectious Diseases, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.