About: http://webisa.webdatacommons.org/98939973

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	This was done by taking a careful history to ensure that these headaches did not have characteristics resembling those of migraine, tension, cluster, and cervicogenic headaches and other forms of headaches.
http://www.w3.org/ns/prov#wasQuotedFrom	jamanetwork.com