<http://schema.org/description>
"Being awake at night and dozing during the day can be a distressing early symptom of Alzheimer's disease, but how the disease disrupts our biological clocks to cause these symptoms has remained elusive."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2014-02-scientists-disruption-alzheimer-disease.html>