1. Discipline of Anaesthesiology and Critical Care, School of Clinical Medicine University of KwaZulu‐Natal Durban South Africa
2. Adult Intensive Care Unit, John Radcliffe Hospital Oxford University Hospitals NHS Foundation Trust Oxford UK
3. Faculty Medicine and Pharmacy Vrije Universiteit Brussel (VUB) Brussels Belgium
4. Department of Anaesthesia and Perioperative Medicine Groote Schuur Hospital and University of Cape Town Cape Town South Africa
5. Statistics Department Nelson Mandela University, South Campus Port Elizabeth South Africa
6. Department of Anaesthetics Nelson R Mandela School of Medicine, University of KwaZulu‐Natal Pietermaritzburg South Africa
7. Netcare Limited Sandton South Africa