Low Back PainNEJM 344:363-370, Deyo,R.A. &Weinstein,J.N., 2001
Back Pain & SciaticaNEJM 318:291-300, Frymoyer,J.W., 1988
Spontaneous Spinal Epidural Hematoma in an 8-year-old BoyNeurol 28:829-832, Ghanem,Q.,et al, 1978