GATA4 and breast cancer: We developed lentiviral vectors to induce the expression of mouse Gata4 (hereafter tet-Gata4) or a control cDNA encoding GFP (hereafter tet-GFP) and infected B16 murine melanoma cells, PyMT S2WTP3 murine breast cancer cells, and KP-derived primary murine lung adenocarcinoma cells (Supplementary Fig. 8a).