Injected with single fibres (F) (Chi-squared test: p,0.0001 both when distribution
Injected with single fibres (F) (Chi-squared test: p,0.0001 both when distribution I was compared to III and distribution II was compared to IV). Size bar = 100 mm. *p,0.05. doi:10.1371/journal.pone.0054599.gto…