Epidemiology of chronic pain, from the laboratory to the bus stop: time to add understanding of biological mechanisms to the study of risk factors in population-based research?

aAberdeen Pain Research Collaboration, Department of General Practice and Primary Care, University of Aberdeen, United Kingdom bAberdeen Pain Research Collaboration, Epidemiology Group, University of Aberdeen, United Kingdom *Corresponding author. Tel.: +44 1224 553972; fax: +44 1224 550683. E-mail: [email protected] Submitted June 21, 2006; revised November 2, 2006; accepted November 6, 2006.