Direct and indirect costs in persons with chronic back pain and comorbid mental disorders--a systematic review.
J Psychosom Res. 2012 Aug;73(2):79-85. doi: 10.1016/j.jpsychores.2012.05.008. Epub 2012 Jun 15.
J Psychosom Res. 2012.
PMID: 22789408
Review.