<http://webisa.webdatacommons.org/19959137>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<clinicaltrials.gov> .
<http://webisa.webdatacommons.org/19959137>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/49745146>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/19959137> .
<http://webisa.webdatacommons.org/19959137>	<http://www.w3.org/ns/prov#value>	"In those procedures, the investigators should use the contrast media, and it may cause kidney toxicity especially in the patients with chronic renal insufficiency." .