Cognitive behavior therapy, exercise, or both for treating chronic widespread pain
McBeth, J., Prescott, G., Scotland, G., Lovell, K., Keeley, P., Hannaford, P., McNamee, P., Symmons, D. P. M., Woby, S., Gkazinou, C., Beasley, M., Macfarlane, G. J.
JAMA Internal Medicine, vol. 172, no. 1, pp. 48-57