1. Department of Anaesthesia and Peri-operative Medicine; University of Cape Town; Cape Town South Africa
2. Department of Anaesthesia; George Provincial Hospital; George South Africa
3. Department of Anaesthesia; Mitchell's Plain Hospital; Cape Town South Africa
4. Department of Anaesthesia; Paarl Provincial Hospital; Paarl South Africa
5. Department of Anaesthesia; Victoria Hospital; Cape Town South Africa
6. Department of Anaesthesia; Worcester Provincial Hospital; Worcester South Africa