Histopathology  positive for GVHD (by H&E) Histopathology negative for GVHD ((by H&E)
    Steroid Sensitivity C4d + C4d - Total C4d + C4d - Total
Colon   Yes 4 1 5 9 0 9
    No 3 0 3 1 0 1
  Total   7 1 8 10 0 10
Skin   Yes 18 11 29 2 1 3
    No 7 1 8 0 0 0
  Total   25 12 37 2 1 3
Table 2: Colon biopsy cases: Comparison of histopathological diagnosis, steroid sensitivity, and C4d positivity.