ORR at week 28, according to NIH cGVHD 2015 response criteria using blinded or investigator assessments. LOCF data are reported for the ITT population (n = 53) using blinded assessments (A) and investigator assessments (B). Error bars represent 95% CI calculated using the exact method of binomial distribution. Fisher’s exact test was used to compare the ORRs between patients treated with SoC compared with SoC+ECP; blinded assessments, P = .373; investigator assessments, P = .551.