In December 2012 ‘Unique immunologic patterns in fibromyalgia’ was published as Behm et al. BMC Clinical Pathology 2012, 12:25
http://www.biomedcentral.com/1472-6890/12/25. The authors measured cytokine levels in the blood of 201 subjects (110 with fibromyalgia). They concluded ‘The cytokine responses to mitogenic activators of PBMC isolated from patients with FM were significantly lower than those of healthy individuals, implying that cell-mediated immunity is impaired in FM patients. This novel cytokine assay reveals unique and valuable immunologic traits, which, when combined with clinical patterns [italics mine], can offer a diagnostic methodology in FM.’