Hassett Afton L, Clauw Daniel J
Department of Anesthesiology, Chronic Pain & Fatigue Research Center, University of Michigan Medical School, Ann Arbor, MI 48106, USA.
Psychiatr Clin North Am. 2011 Sep;34(3):579-94. doi: 10.1016/j.psc.2011.05.004. Epub 2011 Jul 20.