1. Dept. of Anesthesiology and Intensive Care, Jena University Hospital, Jena, Germany;
2. University Hospital, Rotterdam, The Netherlands;
3. Brandenburg Medical School – Theodor Fontane, Neuruppin, Germany;
4. Faculty of Health – School of Medicine, Witten/Herdecke University, Witten, Germany;
5. Institute of Nursing Science and Practice, WHO Collaborating Centre for Nursing Research and Education, Paracelsus Medical University, Salzburg, Austria;
6. Brooks College of Health, University of North Florida, Jacksonville, Florida, USA;
7. Département d’Anesthésie-Réanimation, Groupe Hospitalier Paris Sud, Hôpital Bicêtre, Le Kremlin-Bicêtre, France;
8. SOS Regional Anaesthesia (SOS-RA) Service, Le Kremlin-Bicêtre, France;
9. Neil Betteridge Associates, London, UK;
10. Dept. Medical and Surgical Sciences and Biotechnologies, Unit of Anaesthesia, Intensive Care and Pain Medicine, Sapienza University of Rome – Polo Pontino, Latina, Italy;
11. Anesthesia Critical Care and Pain Management Department, General University Hospital, Valencia, Spain;
12. Department of Anaesthesia, Royal Surrey County Hospital, Guildford, UK;
13. Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK;
14. Department of Anesthesiology and Critical Care, Hôpital Raymond-Poincaré, Garches, France;
15. Pain Clinic, Department of Anaesthesiology, Intensive Care, and Pain Medicine, Helsinki University Hospital and University of Helsinki, Helsinki, Finland;
16. Section for Surgical Pathophysiology, Rigshospitalet, Copenhagen, Denmark;
17. The Leuven Centre for Algology & Pain Management, University of Leuven, Leuven, Belgium;
18. Department of Anesthesiology, Hospitales Mar-Esperanza, Universitat Autònoma Barcelona, Barcelona, Spain;
19. Naples Anesthesia and Pain Associates, Naples, Florida, USA;
20. Charité University, Berlin, Germany