Department of Microbiology, Queen Mary Hospital, Hong Kong,China;
Infection Control Team, Queen Mary Hospital, Hong Kong, China;
Department of Microbiology, Queen Mary Hospital, Hong Kong,China;
Infection Control Team, Queen Mary Hospital, Hong Kong, China;
Department of Microbiology, Queen Mary Hospital, Hong Kong,China;
Infection Control Team, Queen Mary Hospital, Hong Kong, China;
Department of Microbiology, Queen Mary Hospital, Hong Kong,China;
Infection Control Team, Queen Mary Hospital, Hong Kong, China;
Department of Microbiology, Queen Mary Hospital, Hong Kong,China;
Department of Microbiology, Queen Mary Hospital, Hong Kong,China;