The investigators expect to find that, after treatment, the women in the experimental arm will experience greater decreases in depressive symptoms severity as well as in the pain-related variables assessed (pain intensity, fibromyalgia impact, pain-related anxiety, catastrophism, and physical health symptoms severity) than women in the comparison arm. In addition, the percentage of women in remission from the diagnosis of depression (as well as the percentage of women responding to treatment) will be greater in the experimental arm than in the comparison arm. Similarly, the percentage of women who show a clinically significant reduction in pain intensity (decreases greater than two units in the pain intensity scale) will be greater in the experimental arm than in the comparison arm. Finally, the investigators hypothesize that the decreases observed in the pain-related variables will be mediated by decreases observed in depressive symptoms severity.