1. Department of Anaesthesia and Peri‐operative Medicine West Suffolk Hospital Bury St. Edmunds UK
2. Nuffield Department of Anaesthetics Oxford University Hospitals NHS Foundation Trust Oxford UK
3. Department of Anaesthesia Guy's and St Thomas' NHS Foundation Trust London UK
4. King's College London London UK
5. Department of Anaesthesia and Pain Medicine Royal Surrey County Hospital NHS Foundation Trust Guildford UK
6. Department of Anaesthesia, Critical Care and Pain Tata Memorial Centre Homi Bhabha National Institute Mumbai Maharashtra India
7. Huntingdon UK
8. Pain Management Service Critical Care and Anaesthesia Royal Brompton and Harefield NHS Foundation Trust London UK
9. Department of Anaesthesiology, Pain Medicine and Procedural Sedation and Analgesia Martini General Hospital Groningen Groningen The Netherlands
10. Division of Gynecologic Oncology Mayo Clinic Rochester MN USA
11. Bendigo Health Bendigo Victoria Australia
12. School of Pharmacy Pain Centre Versus Arthritis University of Nottingham Nottingham UK
13. Department of Anesthesiology, Peri‐operative and Pain Medicine Stanford University School of Medicine Stanford CA USA
14. Anesthesiology and Peri‐operative Care Service Veterans Affairs Palo Alto Health Care System Palo Alto CA USA
15. Department of Surgical Sciences and Integrated Diagnostics University of Genoa Genoa Italy
16. IRCCS for Oncology and Neurosciences San Martino Policlinico Hospital Genoa Italy
17. Anesthesiology and Critical Care Medicine Perelman School of Medicine University of Pennsylvania Philadelphia PA USA
18. Gastrointestinal Surgery Nottingham Digestive Diseases Centre National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre Nottingham University Hospitals NHS Trust and University of Nottingham Queen's Medical Centre Nottingham UK
19. David Greenfield Metabolic Physiology Unit MRC Versus Arthritis Centre for Musculoskeletal Ageing Research School of Life Sciences University of Nottingham Queen's Medical Centre Nottingham UK
20. Department of Anaesthesia, Pain Medicine and Hyperbaric Medicine Royal Adelaide Hospital and University of Adelaide Adelaide South Australia Australia