1 Department of Intensive Care Services, Royal Brisbane and Women's Hospital, Level 3 Ned Hanlon Building, Butterfield Street, Brisbane, QLD, 4029, Australia. Kevin.laupland@qut.edu.au.
2 Queensland University of Technology (QUT), Brisbane, QLD, Australia. Kevin.laupland@qut.edu.au.
3 Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, Zurich, Switzerland.
4 National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College of London, London, UK.