1. Department of Medicine, Johns Hopkins University School of Medicine
Baltimore, MD, USA; Naples Anesthesia and Pain Associates, Naples, FLUSA
2. Capio S:t Görans Hospital
StockholmSweden
3. Churchill Hospital
OxfordUK
4. Universitätsspital Zurich
ZurichSwitzerland
5. Leicester Royal Infirmary
LeicesterUK
6. Department of Anesthesia, Intensive Care and Pain Therapy, Sapienza University of RomeItaly
7. University Hospital RotterdamThe Netherlands
8. Wilhelminenspital der Stadt Wien
ViennaAustria
9. Poradnia Leczenia Bólu University Hospital
KrakówPoland
10. Hospital de Santo André
LeiriaPortugal
11. Hospital General Universitario de AlicanteSpain
12. Clinique Cecil
LausanneSwitzerland
13. University Hospitals LeuvenBelgium
14. Schmerz- und Palliativzentrum
GöppingenGermany
15. St. Georges Hospital
LondonUK
16. Hospital Universitario de la Princesa
MadridSpain
17. Hôpitaux de Saint-Denis
ParisFrance
18. Teramo ASL
TeramoItaly