title: Comments on review by D.M. Gash, T.J. Collier and J.R. Sladek.
mesh_terms: D000375:Aging; D000818:Animals; D001921:Brain; D001927:Brain Diseases / Q000628:therapy; D002493:Central Nervous System Diseases / Q000628:therapy; D004274:DNA, Recombinant; D006085:Graft Survival; D006801:Humans; D008722:Methods; D009417:Nerve Tissue / Q000637:transplantation*
chemical_list: D004274:DNA, Recombinant