About: http://webisa.webdatacommons.org/406709007

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	The history should answer the questions of the duration of obstruction, any precipitating events such as trauma, are symptoms continuous or intermittent, unilateral or bilateral, or do they alternate from side to side.
http://www.w3.org/ns/prov#wasQuotedFrom	aetna.com