1 Pain Management Research Institute, Kolling Institute of Medical Research, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney and Royal North Shore Hospital, St Leonards, NSW, Australia. bryony.winters@sydney.edu.au.
2 Discipline of Pharmacology, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia.
3 Pain Management Research Institute, Kolling Institute of Medical Research, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney and Royal North Shore Hospital, St Leonards, NSW, Australia.