FGFR3 and breast cancer: In order to confirm the synergy between erdafitinib and quisinostat, we used three BC cell lines with FGFR3 fusions: SW780 cells with FGFR3-BAIBP2L1 fusion, RT112 cells with FGFR3-TACC3 fusion, and RT4 cells with FGFR3-TACC3 fusion.