1. University of Washington; Department of Anesthesiology and Pain Medicine; 1959 NE Pacific St Rm BB 1459 Seattle WA USA 98195
2. Massachusetts General Hospital; Department of Anesthesia and Critical Care; 55 Fruit Street Boston MA USA 02114
3. University of Pennsylvania; Anesthesiology and Critical Care; 3400 Spruce Street Philadelphia PA USA 19140
4. University of Leeds; Leeds Institute of Health Sciences; Charles Thackrah Building 101 Clarendon Road Leeds UK LS2 9LJ
5. Leeds Teaching Hospitals NHS Trust; Chronic Pain Team; L ward Seacroft Hospital York Road Leeds Yorkshire UK LS14 8UH
6. Derby Hospitals NHS Foundation Trust; Anaesthetics and Pain Management; Uttoxeter New Road Derby UK DE22 3NE
7. Seacroft Hospital, Leeds Teaching Hospitals; Pain Clinic; York Road Leeds Yorkshire UK LS14 8UH
8. Leeds Teaching Hospitals NHS Trust; Anaesthesia and Pain Medicine; D Ward, Seacroft Hospital Leeds UK LS14 6UH