Blood samples are collected and analyzed for routine chemistry, cytokines, chemokines, and some instances circulating tumor cells, including response to multiple lung cancer-associated antigens by IFN-γ ELISPOT CD8+ assay; CEA by CD4 class II assay; lung tumor-associated antigens by in vitro proliferation assays; regulatory T-cell (Treg) phenotype by flow cytometry; and Treg function.