CSF2 and graft versus host disease: Moreover, the GM-CSF levels were greater in the GVHD group than in the DED group (16.00 ± 13.89 vs. 2.92 ± 1.68, p < 0.001); however, the difference was not statistically significant between the GVHD and non-GVHD groups (19.43 ± 15.18, p = 0.465).