PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • undergoing major vascular surgery (i.e., vascular surgery except arteriovenous shunt, vein stripping procedures, and carotid endarterectomies)
http://www.w3.org/ns/prov#wasQuotedFrom
  • clinicaltrials.gov