Fig. 1

Schematic representation of the types of GvHD and their onset: a Types of GvHD; b Types of acute GvHD onset and c Types of chronic GvHD onset. DLI donor lymphocyte infusion, GvHD graft versus host disease, GI gastro-intestinal tract, HCT hematopoietic cell transplantation, ≠ Controlled, inactive or resolved, * whichever happened last, Δ GvHD onset.