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Figure 1 Percent change in vessel area over time of the proximal segment of the left anterior descending artery in hearts transplanted within the same gender (female to female = open circles; male to male = open squares) and in hearts transplanted across gender (male to female = solid circles; female to male = solid squares). *p < 0.05 compared with baseline. p < 0.05 compared with percent change in vessel area in all other groups. Data are presented as the mean value ± SEM.