Figure 4From: New immunosuppressive drugs in heart transplantationFrequency distribution of positive cytomegalovirus (CMV) test by polymerase chain reaction analysis in the 34 patients at US centers. Open columns, photopheresis plus standard therapy; filled columns, standard therapy. P = 0.04 by the Wilcoxon rank-sum test for the comparison between groups of the percentage of each patient's tests that were positive. (Adapted from [22].)Back to article page