Parkinson's DiseaseNEJM 339:1044-1053,1130-1143, Lang,A.E.&Lozano,A.M., 1998
Transplantation of Fetal Substantia Nigra & Adrenal Medulla to the Caudate Nucleus in Two Patients with Parkinson's DiseaseNEJM 318:51, Madrazo,I.,et al, 1988