1. 1St John of God Midland Public and Private Hospitals, Perth, Western Australia, Australia
2. 6Department of Anesthesia, ABC Medical Center, Mexico City, Mexico
3. 7Department of Anaesthesia, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
4. 2Department of Anesthesia, Pain Management, and Perioperative Medicine, Dalhousie University, Halifax, Nova Scotia, Canada