Prediction of outcomes after treatment of acute GVHD. Ann Arbor 1 (low), 2 (intermediate), and 3 (high) ST2/Reg3α biomarker risk scores at the onset of complete or nearly complete resolution of acute GVHD after systemic treatment predict the subsequent risks of disease flare (left) and NRM (right) as corticosteroid dosing is tapered. Figure adapted from Akahoshi et al.¹