Lumbar Spinal Stenosis
NEJM 358:818-825, Katz,J.N. &Harris,M.B., 2008
Progressive Multifocal Leukoencephalopathy Associated with Human Immunodeficiency Virus Infection
Ann Int Med 107:78-87, Berger,J.R., 1987
Subcortical Arteriosclerotic Encephalopathy, (Binswanger's Disease)
Arch Neurol 42:951-959, Kinkel,W.R.,et al, 1985