1. aLeiter der Sektion Schmerz, Klinik für Anaesthesiologie und Intensivmedizin, Universitätsklinikum der FSU Jena, Germany
2. bDepartment of Medical and Surgical Sciences and Biotechnologies, Sapienza University of Rome, Italy
3. cService Anesthésie Réanimation, Hôpital Raymond Poincare, Garches, France
4. dUniversity Hospital, Rotterdam, The Netherlands
5. eUniversity Hospitals Leuven, Belgium
6. fFaculty of Health, School of Medicine, Witten/Herdecke University, Cologne, Germany
7. gServicio de Anestesiología, Hospitales Mar-Esperanza, Barcelona, Spain
8. hDepartment of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
9. iNaples Anesthesia and Pain Associates, Naples, FL, USA