Function of FGF-23 in CFU-C transwell migration toward CXCL-12. (A) Colony formation of BM MNCs incubated with FGF-23_comb (n = 3). (B) Transwell migration of CFU-Cs toward CXCL-12 in the presence of FGF-23_comb (n = 3). (C) Colony formation of BM MNCs incubated with FGF-23_comb and FGFR inhibitors (n = 3). (D) Transwell migration of CFU-Cs toward CXCL-12 in the presence of FGF-23_comb and FGFR inhibitors (n = 3). Combined data of 3 independent experiments are shown. Data are means ± SEM. **P < .01; ***P < .001 (ANOVA and Student t test).