Fig. 1From: Tregs and GvHD prevention by extracorporeal photopheresis: observations from a clinical trialAnalysis of the median absolute counts of peripheral HLA-DR + Tregs in patients with and without GvHD. Data show that 20% (1 out of 5) vs. 100% (7 out of 7) of patients with HLA-DR + Tregs had values of > 5 cells/µL in the GvHD vs. non-GvHD groups, respectively (p = 0.01, Fisher exact test)Back to article page