[1] Univ Liverpool, Liverpool Reviews & Implementat Grp, Liverpool, Merseyside, England
[2] MCPHS Univ, Dept Pharm Practice, Boston, MA USA
[3] Atrius Hlth, Dept Pain Med, Boston, MA USA
[4] Univ Glasgow, Inst Hlth & Well Being, Glasgow, Lanark, Scotland
[5] Univ Exeter, Coll Med & Hlth, Exeter, Devon, England
[6] EHC Hop De Morges, Anaesthesia & Pain Management Dept, Morges, Switzerland
[7] Johns Hopkins Univ, Sch Med, Neurosurg Anesthesiol & Crit Care Med, Baltimore, MD USA
[8] James Cook Univ Hosp, Dept Pain Med, Middlesbrough, Cleveland, England