1. Department of Anaesthesiology and Pain Medicine, Maastricht University Hospital, Maastricht, The Netherlands
2. Department of Anaesthesiology, University Medical Centre Groningen, Groningen, The Netherlands
3. Department of Anaesthesia, Pain and Hyperbaric Medicine, Royal Adelaide Hospital, Adelaide, South Australia
4. Faculty of Medicine and Biomedical Sciences, University of Queensland and Royal Brisbane and Women's Hospital, Herston Campus, Brisbane, Queensland