About: http://webisa.webdatacommons.org/370682769

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	Colombo et al (2013) stated that patients affected by chronic forms of headache are often very difficult to treat.
http://www.w3.org/ns/prov#wasQuotedFrom	aetna.com