1. Centre for Pain Research; University of Bath; Bath UK
2. Cochrane Pain, Palliative and Supportive Care Group; Pain Research Unit, Churchill Hospital; Oxford UK
3. Department of Health; University of Bath; Bath UK
4. Bath Centre for Pain Services; Royal United Hospitals Bath NHS Foundation Trust; Bath UK
5. Liverpool John Moores University; Liverpool UK
6. Department of Psychology; University of Bath; Bath UK