- To determine whether germline polymorphisms (DNA) of genes involved in DNA repair (e.g., XPD, ERCC-1, and others) and angiogenesis (e.g., vascular endothelial growth factor [VEGF], interleukin-8, CXCR2, adrenomedullin, leptin, and others) are associated with toxicity and clinical outcome in patients with non-small cell lung cancer enrolled on protocol ECOG-4599.