S-C. Wong a, M. Leung b, L.L-Y. Lee c, K-L. Chung d, V.C-C. Cheng a, e, ⁎ 
a Infection Control Team, Queen Mary Hospital, Hong Kong West Cluster, Hong Kong Special Administrative Region, China
b Central Nursing Department, Hospital Authority, Hong Kong Special Administrative Region, China
c Department of Accidental and Emergency, Tin Shui Wai Hospital, New Territory West Cluster, Hong Kong Special Administrative Region, China
d Quality and Safety Division, Hospital Authority, Hong Kong Special Administrative Region, China
e Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China