1. Department of Anaesthesia, Paarl Hospital,
South Africa
2. Department of Anaesthesia and Peri-Operative Medicine, Faculty of Health Sciences, University of Cape Town,
South Africa
3. Department of Anaesthesia, New Somerset Hospital, Greenpoint,
South Africa
4. Department of Anaesthesiology, University of Vermont Larner College of Medicine,
United States of America
5. Department of Orthopaedics and Rehabilitation, Department of Surgery, University of Vermont Larner College of Medicine,
United States of America