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Verra, Martin L., Felix Angst, Roberto Brioschi, Susanne Lehmann, Francis J. Keefe, J Bart Staal, Rob A. de Bie, and André Aeschlimann. Does Classification of Persons With Fibromyalgia Into Multidimensional Pain Inventory Subgroups Detect Differences in Outcome After a Standard Chronic Pain Management Program? Pulsus Group Inc, 2009.

Verra, Martin L., et al. Does Classification of Persons With Fibromyalgia Into Multidimensional Pain Inventory Subgroups Detect Differences in Outcome After a Standard Chronic Pain Management Program? Pulsus Group Inc, 2009.