Low Back Pain
BMJ 306:901-909, Frank,A., 1993
Neurological and Neuropsychiatric Spectrum of Wilson's Disease:A Prospective Study of 45 Cases
J Neurol 238:281-287, Oder,W.,et al, 1991
Back Pain & Sciatica
NEJM 318:291-300, Frymoyer,J.W., 1988
A Prospective Two-Year Study of Functional Restoration in Industrial Low Back Injury, An Objective Assessment Procesure
JAMA 258:1763-1767, Mayer,T.G.,et al, 1987