cases, the suitability of cell therapy for any given clinical disorder - and indeed for any individual patient - will depend upon the pathogenesis of the host disorder, the homogeneity of the deficient host cell phenotype, the phenotype of the intended donor cells, and the disease environment into which transplantation is anticipated. By matching up disease targets with the phenotypes most appropriate for their treatment, stem cell neurology may hope to advance in the most rapid, resource-efficient and clinically-effective manner going forward.