About: http://webisa.webdatacommons.org/269890644

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	Secondary headache is due to underlying pathology such as infections, vascular causes, trauma, and neoplasms [4].The aetiology of most headaches can be elucidated by careful history and examination.
http://www.w3.org/ns/prov#wasQuotedFrom	hindawi.com