About: http://webisa.webdatacommons.org/277221588

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	In approximately 50% of cases, there is an identifiable underlying clinical condition; in the other 50% no cause is known (idiopathic).
http://www.w3.org/ns/prov#wasQuotedFrom	armc.com