<http://webisa.webdatacommons.org/prov/97677730>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/32652896> .
<http://webisa.webdatacommons.org/32652896>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<biomedsearch.com> .
<http://webisa.webdatacommons.org/32652896>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/32652896>	<http://www.w3.org/ns/prov#value>	"BACKGROUND: Repeated exposure to a low dose of a bacterial endotoxin such as lipopolysaccharide (LPS) causes immune cells to become refractory to a subsequent endotoxin challenge, a phenomenon known as endotoxin tolerance (ET)." .