About: http://webisa.webdatacommons.org/375519219

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	When cortisol gets too low, perhaps after some lingering viral illness, severe stress/trauma, or hormonal issues, etc., insomnia is a common symptom of this deficiency as well as CFS, probably due in part to low serotonin-levels.
http://www.w3.org/ns/prov#wasQuotedFrom	prohealth.com