Chronic Pain Research

Benjamin, S. et al (2000) The association between chronic  widespread pain and mental disorder: a population-based study. Arthritis and Rheumatisum 34: 561-567.

Bonathan, C., Hearn, L., and Williams, A. C. (2013) Socioeconomic status and the course and consequences of chornic pain. Pain Management 3 (3): 159-162.