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2. Quantitative studies on tissue transplantation immunity. II. The origin, strength and duration of adoptively acquired immunity;Billingham,1954
3. Intracerebral grafting of neuronal cell suspensions. I. Introduction and general methods of preparation;Björklund;Acta physiol. scand.,1983
4. Absence of a blood-brain barrier within transplanted neural tissue?;Broadwell;Science,1988
5. Origins of blood vessels in allogeneic neural grafts;Broadwell,1990