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Showing articles 0 to 2 of 2 Filter Applied: substantia nigra tissue (Click to remove) Use of Placebo Surgery in Controlled Trials of a Cellular-Based Therapy for Parkinson's Disease NEJM 341:988-992, Freeman,T.B.,et al, 1999 A Brain Transplant that Works Lancet 335:445-446, , 1990 Showing articles 0 to 2 of 2