<http://schema.org/description>
"Cerebrospinal fluid levels of A&amp;amp;#946;42 appear to be decreased at least five to 10 years before some patients with mild cognitive impairment develop Alzheimer disease (AD) dementia whereas other spinal fluid levels seem to be later markers of disease, according to a report in the January issue of Archives of General Psychiatry."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2012-01-cerebrospinal-fluid-onset-alzheimer-dementia.html>