Role of G-CSF signaling in endogenous revascularization. (A) Serum G-CSF levels in C57BL/6 mice following induction of hindlimb ischemia. (B) Strain-matched wild-type or G-CSFR^–/– (GRKO) mice underwent the hindlimb ischemia procedure and were monitored by laser Doppler perfusion imaging (P = NS). Data represent the mean ± SEM.