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<http://webisa.webdatacommons.org/142891367>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<humpath.com> .
<http://webisa.webdatacommons.org/142891367>	<http://www.w3.org/ns/prov#value>	"Plasma is a better source of tumor-derived circulating cell-free DNA than serum for the detection of EGFR alterations in lung tumor patients." .