CD4 and neoplasm: IHC staining of resection LTFs from 8 tumors representing 5 different tumor types showed reduced total cells (p < 0.05, Figure S5A-B), reduced CD4+ cells (p < 0.05, Figure S5C) and a trend toward reduced CD8+ cells (p = 0.07, Figure S5D) after 48 hours of culture.