Clinical scores. Clinical assessments of body weight, activity, posture, fur texture, and skin integrity were scored weekly. The average and standard deviations of weekly clinical scores over a 10-week period after transfusion for each group were calculated. The error bars represent the standard error for each weekly average. Mice in the GVHD (squares) group had progressively higher clinical scores indicative of TA-GVHD, while mice in the control (diamonds), PCT (triangles), and gamma (circles) groups remained healthy and free of clinical signs of TA-GVHD.