Body weight. Body weight was monitored on a weekly basis for each transfusion group. The average of body weight in the control group (diamonds) increased by 7 g as expected for healthy mice of this age. Mice in the PCT (triangles) and gamma (circles) groups also gained weight, similar to the control group. Mice in the GVHD (squares) group that received untreated transfusions failed to gain weight, an observation consistent with the development of TA-GVHD. Error bars represent the standard error for each group.