- Clinical evidence for cervical myelopathy due to Chiari malformation and spinal stenosis in a non-randomized group of patients with the diagnosis of fibromyalgia. Heffez, D.S., Ross, R.E., Shade-Zeldow, Y., Kostas, K., Shah, S., Gottschalk, R., Elias, D.A., Shepard, A., Leurgans, S.E., Moore, C.G. Eur. Spine. J (2004)