Figure 4, A–D, depict the levels of CXCL10, IFN-γ, other cytokines (TNF-α, IL-4, IL-17A, IL-10, IL12p70, and IL-6), and GVHD biomarkers (ST2, Reg3α, amphiregulin) during the study period. The gene discussed is REG3A; the disease is graft versus host disease.