Parkinson's Disease
JNNP 57:672-681, Marsden,C.D., 1994
Demyelinating Diseases
In Rowlands Merritt's Textbk of Neurology, Lea & Febiger, Phila, 8th Ed, p. 749, Sibley,W.A.,et al, 1989
Tethered Cord Syndrome in Adults
J Neurosurg 57:32-47, Pang,D.&Wilberger,J.E.Jr., 1982