1 Divisions of Critical Care and Pulmonology, Department of Medicine, Charlotte Maxeke Johannesburg Academic Hospital and Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa. mervyn.mer@wits.ac.za.
2 Wits-UQ Critical Care Infection Collaboration, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa. mervyn.mer@wits.ac.za.
3 Department of Intensive Care, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
4 Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A.), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
5 Mahidol-Oxford Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
6 Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.
7 Interdepartmental Division of Critical Care, University of Toronto, Toronto, ON, Canada.