FGF2 and systemic lupus erythematosus: There are positive correlations in the level of PlGF with VEGF and in the level of bFGF with VEGF in the SLE group (r = 0.310, P < 0.05; r = 0.257, P < 0.05), while there is no correlation between the levels of PlGF and bFGF (r = 0.121, P > 0.05).