Fig. 5

Nearest neighbor distances of the human muscle fibers in the grafts. Distances between the largest muscle fibers of human origin in groups 2 and 3, and their nearest neighbors were measured and binned in three groups (<2, 2–5, and >5 μm). Each bin was expressed as percent of the total. The histograms show the distribution of distances between neighboring human muscle fibers. Human myofibers in the grafts in group 3 were more closely spaced than those in group 2 (Fisher’s exact test, p < 0.0001)