About: http://webisa.webdatacommons.org/451208178

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	One leading theory holds that conditions such as depression, anxiety, drug use and serotonin deficiency can aggravate or even cause fibromyalgia by interfering with "stage 4, or deep sleep.
http://www.w3.org/ns/prov#wasQuotedFrom	gmatclub.com