Additional file 1: Figure S1. No difference observed in frequency of T regulatory cells (CD25 + FoxP3+) among human CD4+ T cells in the tumors of control or treated mice. A) Representative flow plots illustrating detection of Tregs by CD25 and FoxP3 and B) frequency of Tregs among CD4+ T cells in the lymph nodes (LN) and tumors (TIL) for each mouse, according to treatment. Bars represent arithmetic means.