Scutellaria extract and wogonin inhibit tumor-mediated induction of T(reg) cells via inhibition of TGF-β1 activity - Dandawate, S; Williams, L; Joshee, N; Rimando, A M; Mittal, S; Thakur, A; Lum, L G; Parajuli, P (Cancer Immunol Immunother, 2012)