Trauma and Multiple Sclerosis:A Population-Based Cohort Study from Olmsted County, Minnesota
Neurol 43:1878-1882, 18711993., Siva,A.,et al, 1993
Surgical Treatment of Cervical Spondylotic Myelopathy:Time for a Controlled Trial
Neurol 42:5-13, Rowland,L.P., 1992