CXCR4 expression on circulating pan-cytokeratin positive cells is associated with survival in patients with advanced non-small cell lung cancer

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Karen L Reckamp^*, Robert A Figlin, Marie D Burdick, Steven M Dubinett, Robert M Elashoff and Robert M Strieter

BMC Cancer 2009, 9:213 doi:10.1186/1471-2407-9-213