1 Infection Control Office, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan.
2 Infection Control Office, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
3 Division of Infectious Diseases and Tropical Medicine, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
4 Infection Control Office, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Division of Infectious Diseases and Tropical Medicine, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan. Electronic address: linjungchung2@gmail.com.