Fig. 1

a Comparison of median ± standard error of the mean immunohistochemical score of amphiregulin, epidermal growth factor, and the amphiregulin/epidermal growth factor ratio between patients with gastrointestinal acute graft-versus-host disease, versus patients with clinical symptoms of acute graft-versus-host disease but non-diagnostic biopsies, patients with new-onset ulcerative colitis, and normal colon from healthy, non-transplant individuals. b Percent of biopsies with an amphiregulin immunohistochemistry score < 2