FGFR1 and osteosarcoma: This osteosarcoma selective effect was independent of FGFR1 or FGFR2 amplification status and was also apparent when FGFR1 or FGFR2 amplified tumor cell lines were excluded from the analysis (AZD4572, p = 7.2 × 10−3 and PD173074, p = 4.3 × 10−2; Figures 2C and 2D).