1 Infection Control Team, Queen Mary Hospital, Hong Kong West Cluster, Hong Kong Special Administrative Region, China.
2 Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, SAR, Hong Kong, China.
3 Infection Control Team, Queen Mary Hospital, Hong Kong West Cluster, Hong Kong Special Administrative Region, China; Department of Microbiology, Queen Mary Hospital, SAR, Hong Kong, China. Electronic address: vcccheng@hku.hk.