Combined treatment of CLL B cells with curcumin/EGCG reduces stromal cell mediated protection against apoptosis. CLL B cells were cultured alone or co-cultured with HS-5 cells and treated with the indicated doses of curcumin (C) and/or EGCG (E). After 24h, cells were collected for Annexin/PI staining for flow cytometric analysis. Mean percent of annexin/PI positive cells are presented with standard error bars.