highly significantP < 0.001
The difference between the mean preinjection (0.05 ± 0.01 μm/s, SEM, n = 31) and the mean postinjection velocity (0.17 ± 0.01 μm/s, n = 56) was highly significant ( P < 0.001).
The difference between the mean preinjection (0.05 ± 0.01 μm/s, SEM, n = 31) and the mean postinjection velocity (0.17 ± 0.01 μm/s, n = 56) was highly significant ( P < 0.001).