Figure 3: Nissl staining, effect of granulocyte-colony stimulating factor (G-CSF) on neuronal density in substantia nigra pars compacta in 6-hydroxydopamine induced Parkinson's disease model of rats, (a) control group, (b) sham operated group, (c) vehicle treated group (d) G-CSF 70 and (e) L-DOPA + carbidopa